./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-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 991fb09b573d5827d0db553f1ea89a581f5a664ba8b68d6f14a043df738f2f6d --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 15:01:45,698 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 15:01:45,767 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 15:01:45,773 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 15:01:45,773 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 15:01:45,804 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 15:01:45,804 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 15:01:45,805 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 15:01:45,807 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 15:01:45,810 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 15:01:45,811 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 15:01:45,811 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 15:01:45,812 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 15:01:45,812 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 15:01:45,812 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 15:01:45,812 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 15:01:45,813 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 15:01:45,813 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 15:01:45,816 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 15:01:45,816 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 15:01:45,816 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 15:01:45,817 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 15:01:45,817 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 15:01:45,817 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 15:01:45,818 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 15:01:45,818 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 15:01:45,818 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 15:01:45,818 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 15:01:45,819 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 15:01:45,819 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 15:01:45,819 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 15:01:45,819 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 15:01:45,820 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 15:01:45,820 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 15:01:45,820 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 15:01:45,820 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 15:01:45,821 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 15:01:45,821 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 15:01:45,821 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 15:01:45,821 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 15:01:45,822 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 15:01:45,822 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 15:01:45,823 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 991fb09b573d5827d0db553f1ea89a581f5a664ba8b68d6f14a043df738f2f6d [2024-11-10 15:01:46,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 15:01:46,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 15:01:46,085 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 15:01:46,086 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 15:01:46,087 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 15:01:46,088 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i [2024-11-10 15:01:47,548 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 15:01:47,785 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 15:01:47,786 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i [2024-11-10 15:01:47,800 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eb98ee36/4331e0d5e8f745f093624c0cb8a4612a/FLAG6c8f431c5 [2024-11-10 15:01:48,119 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4eb98ee36/4331e0d5e8f745f093624c0cb8a4612a [2024-11-10 15:01:48,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 15:01:48,122 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 15:01:48,124 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 15:01:48,124 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 15:01:48,129 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 15:01:48,129 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 03:01:48" (1/1) ... [2024-11-10 15:01:48,130 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1db22d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:01:48, skipping insertion in model container [2024-11-10 15:01:48,130 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 03:01:48" (1/1) ... [2024-11-10 15:01:48,170 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 15:01:48,504 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 15:01:48,507 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 15:01:48,518 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 15:01:48,526 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 15:01:48,586 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 15:01:48,622 INFO L204 MainTranslator]: Completed translation [2024-11-10 15:01:48,622 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:01:48 WrapperNode [2024-11-10 15:01:48,622 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 15:01:48,624 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 15:01:48,624 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 15:01:48,624 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 15:01:48,631 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:01:48" (1/1) ... [2024-11-10 15:01:48,644 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:01:48" (1/1) ... [2024-11-10 15:01:48,679 INFO L138 Inliner]: procedures = 119, calls = 23, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 160 [2024-11-10 15:01:48,680 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 15:01:48,680 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 15:01:48,680 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 15:01:48,680 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 15:01:48,692 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:01:48" (1/1) ... [2024-11-10 15:01:48,692 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:01:48" (1/1) ... [2024-11-10 15:01:48,695 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:01:48" (1/1) ... [2024-11-10 15:01:48,713 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [6, 6]. 50 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 4 writes are split as follows [2, 2]. [2024-11-10 15:01:48,716 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:01:48" (1/1) ... [2024-11-10 15:01:48,717 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:01:48" (1/1) ... [2024-11-10 15:01:48,729 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:01:48" (1/1) ... [2024-11-10 15:01:48,730 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:01:48" (1/1) ... [2024-11-10 15:01:48,731 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:01:48" (1/1) ... [2024-11-10 15:01:48,732 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:01:48" (1/1) ... [2024-11-10 15:01:48,734 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 15:01:48,735 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 15:01:48,735 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 15:01:48,736 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 15:01:48,736 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:01:48" (1/1) ... [2024-11-10 15:01:48,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 15:01:48,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:01:48,773 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) [2024-11-10 15:01:48,775 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 [2024-11-10 15:01:48,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 15:01:48,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 15:01:48,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 15:01:48,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 15:01:48,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-10 15:01:48,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-10 15:01:48,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 15:01:48,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 15:01:48,941 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 15:01:48,943 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 15:01:49,235 INFO L1247 $ProcedureCfgBuilder]: dead code at ProgramPoint L575: havoc main_#t~ret28#1.base, main_#t~ret28#1.offset;call ULTIMATE.dealloc(main_#t~malloc22#1.base, main_#t~malloc22#1.offset);havoc main_#t~malloc22#1.base, main_#t~malloc22#1.offset;call ULTIMATE.dealloc(main_#t~malloc23#1.base, main_#t~malloc23#1.offset);havoc main_#t~malloc23#1.base, main_#t~malloc23#1.offset; [2024-11-10 15:01:49,262 INFO L? ?]: Removed 97 outVars from TransFormulas that were not future-live. [2024-11-10 15:01:49,262 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 15:01:49,276 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 15:01:49,276 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 15:01:49,277 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 03:01:49 BoogieIcfgContainer [2024-11-10 15:01:49,277 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 15:01:49,279 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 15:01:49,279 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 15:01:49,282 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 15:01:49,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 03:01:48" (1/3) ... [2024-11-10 15:01:49,283 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5343dc6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 03:01:49, skipping insertion in model container [2024-11-10 15:01:49,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 03:01:48" (2/3) ... [2024-11-10 15:01:49,283 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5343dc6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 03:01:49, skipping insertion in model container [2024-11-10 15:01:49,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 03:01:49" (3/3) ... [2024-11-10 15:01:49,285 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrstr-alloca-2.i [2024-11-10 15:01:49,301 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 15:01:49,301 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2024-11-10 15:01:49,353 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 15:01:49,360 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;@154b1c57, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 15:01:49,361 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-11-10 15:01:49,365 INFO L276 IsEmpty]: Start isEmpty. Operand has 82 states, 56 states have (on average 1.7857142857142858) internal successors, (100), 81 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) [2024-11-10 15:01:49,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-10 15:01:49,370 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:49,371 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:49,372 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:49,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:49,375 INFO L85 PathProgramCache]: Analyzing trace with hash 820702328, now seen corresponding path program 1 times [2024-11-10 15:01:49,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:49,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106300599] [2024-11-10 15:01:49,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:49,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:49,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:49,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106300599] [2024-11-10 15:01:49,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106300599] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:01:49,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:01:49,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 15:01:49,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153257633] [2024-11-10 15:01:49,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:01:49,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 15:01:49,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:49,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 15:01:49,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 15:01:49,697 INFO L87 Difference]: Start difference. First operand has 82 states, 56 states have (on average 1.7857142857142858) internal successors, (100), 81 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) Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2024-11-10 15:01:49,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:49,760 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2024-11-10 15:01:49,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 15:01:49,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2024-11-10 15:01:49,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:49,773 INFO L225 Difference]: With dead ends: 80 [2024-11-10 15:01:49,773 INFO L226 Difference]: Without dead ends: 77 [2024-11-10 15:01:49,774 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 [2024-11-10 15:01:49,777 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 16 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:49,778 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 131 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:01:49,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-10 15:01:49,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-11-10 15:01:49,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 76 states have internal predecessors, (89), 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) [2024-11-10 15:01:49,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2024-11-10 15:01:49,805 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 8 [2024-11-10 15:01:49,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:49,806 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2024-11-10 15:01:49,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2024-11-10 15:01:49,806 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2024-11-10 15:01:49,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-10 15:01:49,807 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:49,807 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:49,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 15:01:49,807 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:49,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:49,808 INFO L85 PathProgramCache]: Analyzing trace with hash 820702329, now seen corresponding path program 1 times [2024-11-10 15:01:49,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:49,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191940428] [2024-11-10 15:01:49,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:49,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:50,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:50,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191940428] [2024-11-10 15:01:50,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191940428] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:01:50,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:01:50,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 15:01:50,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533354615] [2024-11-10 15:01:50,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:01:50,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 15:01:50,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:50,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 15:01:50,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 15:01:50,216 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2024-11-10 15:01:50,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:50,411 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2024-11-10 15:01:50,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 15:01:50,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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 8 [2024-11-10 15:01:50,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:50,413 INFO L225 Difference]: With dead ends: 97 [2024-11-10 15:01:50,414 INFO L226 Difference]: Without dead ends: 97 [2024-11-10 15:01:50,414 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-10 15:01:50,415 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 23 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:50,416 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 304 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-10 15:01:50,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-10 15:01:50,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2024-11-10 15:01:50,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 59 states have (on average 1.6101694915254237) internal successors, (95), 81 states have internal predecessors, (95), 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) [2024-11-10 15:01:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2024-11-10 15:01:50,428 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 8 [2024-11-10 15:01:50,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:50,429 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2024-11-10 15:01:50,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 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) [2024-11-10 15:01:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2024-11-10 15:01:50,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-10 15:01:50,432 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:50,432 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:50,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 15:01:50,433 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:50,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:50,434 INFO L85 PathProgramCache]: Analyzing trace with hash 849331480, now seen corresponding path program 1 times [2024-11-10 15:01:50,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:50,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829231210] [2024-11-10 15:01:50,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:50,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:50,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:50,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829231210] [2024-11-10 15:01:50,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829231210] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:01:50,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:01:50,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 15:01:50,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661013753] [2024-11-10 15:01:50,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:01:50,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 15:01:50,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:50,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 15:01:50,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-10 15:01:50,660 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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) [2024-11-10 15:01:50,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:50,772 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2024-11-10 15:01:50,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 15:01:50,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 8 [2024-11-10 15:01:50,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:50,774 INFO L225 Difference]: With dead ends: 86 [2024-11-10 15:01:50,776 INFO L226 Difference]: Without dead ends: 86 [2024-11-10 15:01:50,776 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:01:50,777 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 40 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:50,778 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 258 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:01:50,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-10 15:01:50,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2024-11-10 15:01:50,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.6140350877192982) internal successors, (92), 79 states have internal predecessors, (92), 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) [2024-11-10 15:01:50,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2024-11-10 15:01:50,790 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 8 [2024-11-10 15:01:50,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:50,790 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2024-11-10 15:01:50,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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) [2024-11-10 15:01:50,790 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2024-11-10 15:01:50,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-10 15:01:50,791 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:50,791 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:50,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 15:01:50,791 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:50,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:50,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1336872741, now seen corresponding path program 1 times [2024-11-10 15:01:50,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:50,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595570606] [2024-11-10 15:01:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:50,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:50,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:50,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595570606] [2024-11-10 15:01:50,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595570606] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:01:50,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391239835] [2024-11-10 15:01:50,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:50,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:50,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:01:50,861 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) [2024-11-10 15:01:50,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 15:01:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:50,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-10 15:01:50,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:01:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:51,021 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 15:01:51,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391239835] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:01:51,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 15:01:51,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-10 15:01:51,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256074023] [2024-11-10 15:01:51,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:01:51,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 15:01:51,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:51,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 15:01:51,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:01:51,027 INFO L87 Difference]: Start difference. First operand 80 states and 92 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) [2024-11-10 15:01:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:51,066 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2024-11-10 15:01:51,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 15:01:51,067 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 12 [2024-11-10 15:01:51,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:51,068 INFO L225 Difference]: With dead ends: 97 [2024-11-10 15:01:51,068 INFO L226 Difference]: Without dead ends: 97 [2024-11-10 15:01:51,069 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:01:51,070 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 11 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:51,073 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 318 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:01:51,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-10 15:01:51,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2024-11-10 15:01:51,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 87 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) [2024-11-10 15:01:51,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2024-11-10 15:01:51,086 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 12 [2024-11-10 15:01:51,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:51,087 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2024-11-10 15:01:51,087 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) [2024-11-10 15:01:51,087 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2024-11-10 15:01:51,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-10 15:01:51,087 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:51,088 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:51,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 15:01:51,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:51,292 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:51,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:51,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1533386246, now seen corresponding path program 1 times [2024-11-10 15:01:51,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:51,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333472723] [2024-11-10 15:01:51,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:51,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:51,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:51,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333472723] [2024-11-10 15:01:51,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333472723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:01:51,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183001385] [2024-11-10 15:01:51,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:51,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:51,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:01:51,529 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) [2024-11-10 15:01:51,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 15:01:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:51,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 15:01:51,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:01:51,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-10 15:01:51,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 7 [2024-11-10 15:01:51,677 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 10 treesize of output 8 [2024-11-10 15:01:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:51,890 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:01:52,106 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-10 15:01:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 15:01:52,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183001385] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:01:52,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:01:52,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-10 15:01:52,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740710078] [2024-11-10 15:01:52,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:01:52,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-10 15:01:52,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:52,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-10 15:01:52,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-10 15:01:52,156 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 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) [2024-11-10 15:01:52,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:52,368 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2024-11-10 15:01:52,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 15:01:52,369 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 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 12 [2024-11-10 15:01:52,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:52,371 INFO L225 Difference]: With dead ends: 88 [2024-11-10 15:01:52,371 INFO L226 Difference]: Without dead ends: 88 [2024-11-10 15:01:52,371 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2024-11-10 15:01:52,372 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 30 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:52,372 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 453 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:01:52,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-10 15:01:52,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2024-11-10 15:01:52,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.546875) internal successors, (99), 85 states have internal predecessors, (99), 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) [2024-11-10 15:01:52,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2024-11-10 15:01:52,380 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 12 [2024-11-10 15:01:52,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:52,380 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2024-11-10 15:01:52,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 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) [2024-11-10 15:01:52,381 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2024-11-10 15:01:52,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-10 15:01:52,381 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:52,382 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:52,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 15:01:52,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:52,583 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:52,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:52,583 INFO L85 PathProgramCache]: Analyzing trace with hash 454038755, now seen corresponding path program 1 times [2024-11-10 15:01:52,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:52,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789450516] [2024-11-10 15:01:52,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:52,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:52,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:52,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789450516] [2024-11-10 15:01:52,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789450516] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:01:52,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:01:52,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 15:01:52,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195779567] [2024-11-10 15:01:52,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:01:52,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 15:01:52,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:52,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 15:01:52,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-10 15:01:52,708 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2024-11-10 15:01:52,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:52,760 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2024-11-10 15:01:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 15:01:52,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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 [2024-11-10 15:01:52,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:52,761 INFO L225 Difference]: With dead ends: 92 [2024-11-10 15:01:52,761 INFO L226 Difference]: Without dead ends: 92 [2024-11-10 15:01:52,762 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-10 15:01:52,762 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 28 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:52,763 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 202 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:01:52,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-10 15:01:52,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2024-11-10 15:01:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 64 states have (on average 1.515625) internal successors, (97), 83 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) [2024-11-10 15:01:52,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2024-11-10 15:01:52,769 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 15 [2024-11-10 15:01:52,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:52,769 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2024-11-10 15:01:52,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2024-11-10 15:01:52,770 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2024-11-10 15:01:52,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-10 15:01:52,774 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:52,774 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:52,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 15:01:52,775 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:52,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:52,775 INFO L85 PathProgramCache]: Analyzing trace with hash 454038756, now seen corresponding path program 1 times [2024-11-10 15:01:52,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:52,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084917253] [2024-11-10 15:01:52,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:52,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:52,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:52,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084917253] [2024-11-10 15:01:52,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084917253] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:01:52,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:01:52,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 15:01:52,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516747140] [2024-11-10 15:01:52,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:01:52,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 15:01:52,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:52,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 15:01:52,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:01:52,925 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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) [2024-11-10 15:01:53,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:53,025 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2024-11-10 15:01:53,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 15:01:53,025 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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 [2024-11-10 15:01:53,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:53,026 INFO L225 Difference]: With dead ends: 88 [2024-11-10 15:01:53,026 INFO L226 Difference]: Without dead ends: 88 [2024-11-10 15:01:53,026 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-11-10 15:01:53,027 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 42 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:53,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 246 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:01:53,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-10 15:01:53,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2024-11-10 15:01:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 67 states have (on average 1.492537313432836) internal successors, (100), 86 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) [2024-11-10 15:01:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2024-11-10 15:01:53,031 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 15 [2024-11-10 15:01:53,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:53,032 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2024-11-10 15:01:53,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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) [2024-11-10 15:01:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2024-11-10 15:01:53,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-10 15:01:53,033 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:53,033 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:53,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 15:01:53,033 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:53,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:53,034 INFO L85 PathProgramCache]: Analyzing trace with hash 964739334, now seen corresponding path program 1 times [2024-11-10 15:01:53,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:53,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664384867] [2024-11-10 15:01:53,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:53,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:53,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:53,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:53,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664384867] [2024-11-10 15:01:53,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664384867] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:01:53,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815403112] [2024-11-10 15:01:53,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:53,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:53,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:01:53,261 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) [2024-11-10 15:01:53,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 15:01:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:53,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-10 15:01:53,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:01:53,345 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 7 [2024-11-10 15:01:53,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-11-10 15:01:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:53,604 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:01:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:53,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815403112] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:01:53,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:01:53,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2024-11-10 15:01:53,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630130729] [2024-11-10 15:01:53,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:01:53,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 15:01:53,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:53,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 15:01:53,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2024-11-10 15:01:53,935 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 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) [2024-11-10 15:01:54,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:54,145 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2024-11-10 15:01:54,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 15:01:54,146 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 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 [2024-11-10 15:01:54,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:54,147 INFO L225 Difference]: With dead ends: 89 [2024-11-10 15:01:54,147 INFO L226 Difference]: Without dead ends: 89 [2024-11-10 15:01:54,147 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2024-11-10 15:01:54,148 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 14 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:54,148 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 458 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:01:54,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-10 15:01:54,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2024-11-10 15:01:54,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 84 states have internal predecessors, (98), 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) [2024-11-10 15:01:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2024-11-10 15:01:54,152 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 19 [2024-11-10 15:01:54,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:54,152 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2024-11-10 15:01:54,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 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) [2024-11-10 15:01:54,152 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2024-11-10 15:01:54,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-10 15:01:54,153 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:54,153 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:54,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-10 15:01:54,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:54,358 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:54,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:54,358 INFO L85 PathProgramCache]: Analyzing trace with hash -157853677, now seen corresponding path program 1 times [2024-11-10 15:01:54,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:54,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676632855] [2024-11-10 15:01:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:54,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:54,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:54,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676632855] [2024-11-10 15:01:54,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676632855] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:01:54,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638338025] [2024-11-10 15:01:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:54,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:54,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:01:54,462 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) [2024-11-10 15:01:54,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 15:01:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:54,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-10 15:01:54,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:01:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:54,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:01:54,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-10 15:01:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:54,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638338025] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:01:54,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:01:54,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-10 15:01:54,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577670251] [2024-11-10 15:01:54,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:01:54,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-10 15:01:54,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-10 15:01:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-10 15:01:54,742 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 10 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) [2024-11-10 15:01:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:54,848 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2024-11-10 15:01:54,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 15:01:54,849 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 10 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 20 [2024-11-10 15:01:54,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:54,850 INFO L225 Difference]: With dead ends: 94 [2024-11-10 15:01:54,850 INFO L226 Difference]: Without dead ends: 94 [2024-11-10 15:01:54,850 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2024-11-10 15:01:54,851 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 7 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:54,851 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 339 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:01:54,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-10 15:01:54,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-11-10 15:01:54,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 75 states have (on average 1.44) internal successors, (108), 93 states have internal predecessors, (108), 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) [2024-11-10 15:01:54,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2024-11-10 15:01:54,854 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 20 [2024-11-10 15:01:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:54,854 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2024-11-10 15:01:54,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 10 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) [2024-11-10 15:01:54,855 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2024-11-10 15:01:54,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-10 15:01:54,855 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:54,856 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:54,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-10 15:01:55,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:55,060 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:55,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:55,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1154926030, now seen corresponding path program 1 times [2024-11-10 15:01:55,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:55,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590071739] [2024-11-10 15:01:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:55,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:55,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:55,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590071739] [2024-11-10 15:01:55,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590071739] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:01:55,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:01:55,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 15:01:55,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975464861] [2024-11-10 15:01:55,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:01:55,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 15:01:55,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:55,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 15:01:55,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:01:55,161 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 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) [2024-11-10 15:01:55,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:55,214 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2024-11-10 15:01:55,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 15:01:55,215 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 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 20 [2024-11-10 15:01:55,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:55,215 INFO L225 Difference]: With dead ends: 93 [2024-11-10 15:01:55,216 INFO L226 Difference]: Without dead ends: 93 [2024-11-10 15:01:55,216 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:01:55,216 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 2 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:55,217 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 208 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:01:55,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-10 15:01:55,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2024-11-10 15:01:55,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 83 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) [2024-11-10 15:01:55,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2024-11-10 15:01:55,225 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 20 [2024-11-10 15:01:55,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:55,225 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2024-11-10 15:01:55,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 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) [2024-11-10 15:01:55,225 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2024-11-10 15:01:55,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-10 15:01:55,226 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:55,226 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:55,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 15:01:55,226 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:55,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:55,226 INFO L85 PathProgramCache]: Analyzing trace with hash -598496669, now seen corresponding path program 1 times [2024-11-10 15:01:55,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:55,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482763071] [2024-11-10 15:01:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:55,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:55,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:55,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482763071] [2024-11-10 15:01:55,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482763071] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:01:55,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:01:55,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 15:01:55,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819567472] [2024-11-10 15:01:55,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:01:55,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 15:01:55,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:55,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 15:01:55,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:01:55,355 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 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) [2024-11-10 15:01:55,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:55,389 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2024-11-10 15:01:55,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 15:01:55,389 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 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 21 [2024-11-10 15:01:55,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:55,390 INFO L225 Difference]: With dead ends: 84 [2024-11-10 15:01:55,390 INFO L226 Difference]: Without dead ends: 84 [2024-11-10 15:01:55,390 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:01:55,391 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 1 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:55,391 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 224 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:01:55,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-10 15:01:55,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2024-11-10 15:01:55,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 82 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) [2024-11-10 15:01:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2024-11-10 15:01:55,397 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 21 [2024-11-10 15:01:55,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:55,397 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2024-11-10 15:01:55,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 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) [2024-11-10 15:01:55,397 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2024-11-10 15:01:55,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-10 15:01:55,398 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:55,398 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:55,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-10 15:01:55,398 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:55,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:55,398 INFO L85 PathProgramCache]: Analyzing trace with hash 370319424, now seen corresponding path program 1 times [2024-11-10 15:01:55,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:55,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618619336] [2024-11-10 15:01:55,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:55,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:55,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:55,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618619336] [2024-11-10 15:01:55,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618619336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:01:55,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810276451] [2024-11-10 15:01:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:55,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:55,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:01:55,591 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) [2024-11-10 15:01:55,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 15:01:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:55,672 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-10 15:01:55,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:01:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:55,755 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:01:55,790 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 16 [2024-11-10 15:01:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:55,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810276451] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:01:55,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:01:55,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-11-10 15:01:55,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416849383] [2024-11-10 15:01:55,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:01:55,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 15:01:55,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:55,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 15:01:55,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-10 15:01:55,818 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 11 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 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) [2024-11-10 15:01:55,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:55,903 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2024-11-10 15:01:55,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 15:01:55,904 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 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 [2024-11-10 15:01:55,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:55,904 INFO L225 Difference]: With dead ends: 84 [2024-11-10 15:01:55,904 INFO L226 Difference]: Without dead ends: 84 [2024-11-10 15:01:55,905 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-10 15:01:55,905 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 8 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:55,905 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 333 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:01:55,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-10 15:01:55,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2024-11-10 15:01:55,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 81 states have internal predecessors, (95), 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) [2024-11-10 15:01:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2024-11-10 15:01:55,908 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 23 [2024-11-10 15:01:55,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:55,908 INFO L471 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2024-11-10 15:01:55,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 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) [2024-11-10 15:01:55,908 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2024-11-10 15:01:55,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-10 15:01:55,909 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:55,909 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:55,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-10 15:01:56,113 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,SelfDestructingSolverStorable11 [2024-11-10 15:01:56,114 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:56,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:56,114 INFO L85 PathProgramCache]: Analyzing trace with hash 370319423, now seen corresponding path program 1 times [2024-11-10 15:01:56,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:56,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253430922] [2024-11-10 15:01:56,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:56,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:56,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:56,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253430922] [2024-11-10 15:01:56,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253430922] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:01:56,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:01:56,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 15:01:56,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616703143] [2024-11-10 15:01:56,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:01:56,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 15:01:56,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:56,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 15:01:56,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 15:01:56,167 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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) [2024-11-10 15:01:56,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:56,211 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2024-11-10 15:01:56,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 15:01:56,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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 [2024-11-10 15:01:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:56,213 INFO L225 Difference]: With dead ends: 81 [2024-11-10 15:01:56,213 INFO L226 Difference]: Without dead ends: 81 [2024-11-10 15:01:56,213 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 15:01:56,215 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 7 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:56,215 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 175 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:01:56,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-10 15:01:56,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-11-10 15:01:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.4242424242424243) internal successors, (94), 80 states have internal predecessors, (94), 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) [2024-11-10 15:01:56,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2024-11-10 15:01:56,218 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 23 [2024-11-10 15:01:56,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:56,219 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2024-11-10 15:01:56,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 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) [2024-11-10 15:01:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2024-11-10 15:01:56,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-10 15:01:56,220 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:56,220 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:56,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-10 15:01:56,221 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:56,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:56,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1890552710, now seen corresponding path program 1 times [2024-11-10 15:01:56,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:56,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025993882] [2024-11-10 15:01:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:56,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:56,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:56,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:56,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025993882] [2024-11-10 15:01:56,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025993882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:01:56,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:01:56,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 15:01:56,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335182158] [2024-11-10 15:01:56,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:01:56,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 15:01:56,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:56,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 15:01:56,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 15:01:56,303 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 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) [2024-11-10 15:01:56,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:56,361 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2024-11-10 15:01:56,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 15:01:56,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 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 27 [2024-11-10 15:01:56,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:56,363 INFO L225 Difference]: With dead ends: 80 [2024-11-10 15:01:56,363 INFO L226 Difference]: Without dead ends: 80 [2024-11-10 15:01:56,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-10 15:01:56,363 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 63 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:56,364 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 161 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:01:56,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-10 15:01:56,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-11-10 15:01:56,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 79 states have internal predecessors, (93), 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) [2024-11-10 15:01:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2024-11-10 15:01:56,366 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 27 [2024-11-10 15:01:56,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:56,367 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2024-11-10 15:01:56,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 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) [2024-11-10 15:01:56,367 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2024-11-10 15:01:56,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-10 15:01:56,369 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:56,369 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:56,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-10 15:01:56,370 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:56,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:56,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1890552709, now seen corresponding path program 1 times [2024-11-10 15:01:56,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:56,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386555362] [2024-11-10 15:01:56,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:56,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:56,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:56,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386555362] [2024-11-10 15:01:56,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386555362] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:01:56,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598923946] [2024-11-10 15:01:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:56,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:56,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:01:56,622 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) [2024-11-10 15:01:56,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 15:01:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:56,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-10 15:01:56,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:01:56,783 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 [2024-11-10 15:01:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:56,822 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:01:56,832 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 13 treesize of output 11 [2024-11-10 15:01:56,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-10 15:01:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:56,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598923946] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:01:56,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:01:56,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 18 [2024-11-10 15:01:56,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560721077] [2024-11-10 15:01:56,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:01:56,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-10 15:01:56,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:56,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-10 15:01:56,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2024-11-10 15:01:56,906 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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) [2024-11-10 15:01:57,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:57,099 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2024-11-10 15:01:57,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-10 15:01:57,099 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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 27 [2024-11-10 15:01:57,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:57,100 INFO L225 Difference]: With dead ends: 114 [2024-11-10 15:01:57,100 INFO L226 Difference]: Without dead ends: 114 [2024-11-10 15:01:57,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2024-11-10 15:01:57,101 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 40 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:57,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 797 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:01:57,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-10 15:01:57,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2024-11-10 15:01:57,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 98 states have (on average 1.3061224489795917) internal successors, (128), 111 states have internal predecessors, (128), 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) [2024-11-10 15:01:57,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 128 transitions. [2024-11-10 15:01:57,103 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 128 transitions. Word has length 27 [2024-11-10 15:01:57,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:57,104 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 128 transitions. [2024-11-10 15:01:57,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 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) [2024-11-10 15:01:57,104 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 128 transitions. [2024-11-10 15:01:57,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-10 15:01:57,105 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:57,105 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:57,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-10 15:01:57,305 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 [2024-11-10 15:01:57,306 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:57,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:57,306 INFO L85 PathProgramCache]: Analyzing trace with hash -51063366, now seen corresponding path program 1 times [2024-11-10 15:01:57,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:57,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653287332] [2024-11-10 15:01:57,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:57,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 15:01:57,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:57,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653287332] [2024-11-10 15:01:57,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653287332] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:01:57,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:01:57,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 15:01:57,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059480743] [2024-11-10 15:01:57,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:01:57,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 15:01:57,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:57,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 15:01:57,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 15:01:57,422 INFO L87 Difference]: Start difference. First operand 112 states and 128 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 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) [2024-11-10 15:01:57,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:57,457 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2024-11-10 15:01:57,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 15:01:57,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 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 29 [2024-11-10 15:01:57,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:57,458 INFO L225 Difference]: With dead ends: 111 [2024-11-10 15:01:57,458 INFO L226 Difference]: Without dead ends: 78 [2024-11-10 15:01:57,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 15:01:57,459 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 53 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:57,459 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 116 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:01:57,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-10 15:01:57,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-10 15:01:57,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 77 states have internal predecessors, (87), 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) [2024-11-10 15:01:57,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2024-11-10 15:01:57,461 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 29 [2024-11-10 15:01:57,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:57,462 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2024-11-10 15:01:57,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 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) [2024-11-10 15:01:57,462 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2024-11-10 15:01:57,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-10 15:01:57,463 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:57,463 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:57,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-10 15:01:57,463 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:57,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:57,463 INFO L85 PathProgramCache]: Analyzing trace with hash 998636957, now seen corresponding path program 2 times [2024-11-10 15:01:57,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:57,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275528551] [2024-11-10 15:01:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:57,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:57,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:57,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275528551] [2024-11-10 15:01:57,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275528551] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:01:57,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329101249] [2024-11-10 15:01:57,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 15:01:57,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:57,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:01:57,748 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) [2024-11-10 15:01:57,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 15:01:57,824 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-10 15:01:57,824 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:01:57,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-10 15:01:57,828 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:01:57,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-10 15:01:57,957 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 15:01:57,958 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 20 treesize of output 17 [2024-11-10 15:01:58,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-10 15:01:58,046 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 15:01:58,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329101249] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:01:58,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 15:01:58,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2024-11-10 15:01:58,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707529780] [2024-11-10 15:01:58,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:01:58,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 15:01:58,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:58,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 15:01:58,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-11-10 15:01:58,047 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 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) [2024-11-10 15:01:58,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:58,244 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2024-11-10 15:01:58,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 15:01:58,244 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 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 31 [2024-11-10 15:01:58,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:58,245 INFO L225 Difference]: With dead ends: 82 [2024-11-10 15:01:58,245 INFO L226 Difference]: Without dead ends: 82 [2024-11-10 15:01:58,245 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-11-10 15:01:58,246 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 107 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:58,246 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 222 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:01:58,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-10 15:01:58,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2024-11-10 15:01:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 67 states have (on average 1.328358208955224) internal successors, (89), 79 states have internal predecessors, (89), 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) [2024-11-10 15:01:58,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2024-11-10 15:01:58,248 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 31 [2024-11-10 15:01:58,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:58,250 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2024-11-10 15:01:58,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 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) [2024-11-10 15:01:58,250 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2024-11-10 15:01:58,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-10 15:01:58,252 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:58,252 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:58,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-10 15:01:58,456 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 [2024-11-10 15:01:58,457 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:58,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:58,457 INFO L85 PathProgramCache]: Analyzing trace with hash -844864343, now seen corresponding path program 1 times [2024-11-10 15:01:58,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:58,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859597182] [2024-11-10 15:01:58,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:58,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:58,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:58,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859597182] [2024-11-10 15:01:58,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859597182] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:01:58,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311337198] [2024-11-10 15:01:58,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:58,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:58,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:01:58,831 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) [2024-11-10 15:01:58,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 15:01:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:58,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-10 15:01:58,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:01:59,016 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 13 treesize of output 9 [2024-11-10 15:01:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:59,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:01:59,118 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 13 [2024-11-10 15:01:59,122 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 16 treesize of output 12 [2024-11-10 15:01:59,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:01:59,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311337198] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:01:59,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:01:59,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 24 [2024-11-10 15:01:59,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084540112] [2024-11-10 15:01:59,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:01:59,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-10 15:01:59,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:59,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-10 15:01:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2024-11-10 15:01:59,191 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 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) [2024-11-10 15:01:59,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:59,451 INFO L93 Difference]: Finished difference Result 133 states and 148 transitions. [2024-11-10 15:01:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-10 15:01:59,452 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 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 34 [2024-11-10 15:01:59,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:59,452 INFO L225 Difference]: With dead ends: 133 [2024-11-10 15:01:59,452 INFO L226 Difference]: Without dead ends: 133 [2024-11-10 15:01:59,453 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2024-11-10 15:01:59,453 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 113 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:01:59,453 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 792 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:01:59,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-10 15:01:59,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 94. [2024-11-10 15:01:59,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 93 states have internal predecessors, (104), 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) [2024-11-10 15:01:59,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2024-11-10 15:01:59,457 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 34 [2024-11-10 15:01:59,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:59,458 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2024-11-10 15:01:59,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 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) [2024-11-10 15:01:59,458 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2024-11-10 15:01:59,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-10 15:01:59,458 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:59,459 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:59,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-10 15:01:59,662 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 [2024-11-10 15:01:59,663 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:59,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:59,663 INFO L85 PathProgramCache]: Analyzing trace with hash -910141835, now seen corresponding path program 1 times [2024-11-10 15:01:59,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:59,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231437753] [2024-11-10 15:01:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:59,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:59,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:01:59,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:59,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231437753] [2024-11-10 15:01:59,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231437753] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:01:59,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:01:59,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 15:01:59,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519197934] [2024-11-10 15:01:59,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:01:59,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 15:01:59,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:01:59,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 15:01:59,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 15:01:59,731 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 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) [2024-11-10 15:01:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:01:59,785 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2024-11-10 15:01:59,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 15:01:59,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 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 [2024-11-10 15:01:59,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:01:59,786 INFO L225 Difference]: With dead ends: 93 [2024-11-10 15:01:59,786 INFO L226 Difference]: Without dead ends: 93 [2024-11-10 15:01:59,786 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-10 15:01:59,786 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 40 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 143 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 [2024-11-10 15:01:59,787 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 143 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:01:59,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-10 15:01:59,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2024-11-10 15:01:59,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 81 states have (on average 1.271604938271605) internal successors, (103), 92 states have internal predecessors, (103), 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) [2024-11-10 15:01:59,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2024-11-10 15:01:59,789 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 37 [2024-11-10 15:01:59,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:01:59,789 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2024-11-10 15:01:59,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 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) [2024-11-10 15:01:59,790 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2024-11-10 15:01:59,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-10 15:01:59,790 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:01:59,790 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:01:59,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-10 15:01:59,790 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:01:59,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:01:59,791 INFO L85 PathProgramCache]: Analyzing trace with hash -910141834, now seen corresponding path program 1 times [2024-11-10 15:01:59,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:01:59,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872766073] [2024-11-10 15:01:59,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:59,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:01:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:01:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:01:59,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:01:59,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872766073] [2024-11-10 15:01:59,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872766073] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:01:59,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293812762] [2024-11-10 15:01:59,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:01:59,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:01:59,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:01:59,939 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) [2024-11-10 15:01:59,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 15:02:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:00,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 15:02:00,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:00,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:00,280 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 16 [2024-11-10 15:02:00,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:00,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293812762] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:02:00,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:02:00,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-11-10 15:02:00,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976646687] [2024-11-10 15:02:00,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:02:00,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 15:02:00,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:00,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 15:02:00,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-10 15:02:00,298 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand has 11 states, 10 states have (on average 6.0) internal successors, (60), 11 states have internal predecessors, (60), 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) [2024-11-10 15:02:00,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:00,407 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2024-11-10 15:02:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 15:02:00,408 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.0) internal successors, (60), 11 states have internal predecessors, (60), 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 [2024-11-10 15:02:00,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:00,408 INFO L225 Difference]: With dead ends: 98 [2024-11-10 15:02:00,408 INFO L226 Difference]: Without dead ends: 98 [2024-11-10 15:02:00,409 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-10 15:02:00,410 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 9 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:00,411 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 331 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:02:00,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-10 15:02:00,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2024-11-10 15:02:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 84 states have (on average 1.2619047619047619) internal successors, (106), 95 states have internal predecessors, (106), 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) [2024-11-10 15:02:00,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2024-11-10 15:02:00,416 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 37 [2024-11-10 15:02:00,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:00,416 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2024-11-10 15:02:00,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.0) internal successors, (60), 11 states have internal predecessors, (60), 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) [2024-11-10 15:02:00,417 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2024-11-10 15:02:00,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-10 15:02:00,417 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:00,417 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:00,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-10 15:02:00,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:00,618 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:00,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:00,618 INFO L85 PathProgramCache]: Analyzing trace with hash 951759175, now seen corresponding path program 2 times [2024-11-10 15:02:00,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:00,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021852827] [2024-11-10 15:02:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:00,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:02:00,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:00,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021852827] [2024-11-10 15:02:00,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021852827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:00,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565742147] [2024-11-10 15:02:00,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 15:02:00,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:00,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:00,995 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) [2024-11-10 15:02:00,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-10 15:02:01,090 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 15:02:01,090 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:02:01,095 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-10 15:02:01,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:02:01,263 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:01,369 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 21 treesize of output 17 [2024-11-10 15:02:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:02:01,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565742147] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:02:01,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:02:01,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-11-10 15:02:01,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557259969] [2024-11-10 15:02:01,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:02:01,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-10 15:02:01,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:01,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-10 15:02:01,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2024-11-10 15:02:01,558 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 27 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 27 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) [2024-11-10 15:02:01,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:01,944 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2024-11-10 15:02:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-10 15:02:01,945 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 27 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) Word has length 38 [2024-11-10 15:02:01,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:01,946 INFO L225 Difference]: With dead ends: 142 [2024-11-10 15:02:01,946 INFO L226 Difference]: Without dead ends: 142 [2024-11-10 15:02:01,946 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=868, Unknown=0, NotChecked=0, Total=1056 [2024-11-10 15:02:01,947 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 77 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:01,947 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 852 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-10 15:02:01,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-10 15:02:01,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2024-11-10 15:02:01,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.264367816091954) internal successors, (110), 98 states have internal predecessors, (110), 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) [2024-11-10 15:02:01,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2024-11-10 15:02:01,952 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 38 [2024-11-10 15:02:01,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:01,953 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2024-11-10 15:02:01,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.6923076923076925) internal successors, (96), 27 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) [2024-11-10 15:02:01,953 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2024-11-10 15:02:01,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-10 15:02:01,953 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:01,954 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:01,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-10 15:02:02,157 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 [2024-11-10 15:02:02,158 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:02,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:02,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1516496705, now seen corresponding path program 3 times [2024-11-10 15:02:02,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:02,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457032598] [2024-11-10 15:02:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:02,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:02:02,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:02,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457032598] [2024-11-10 15:02:02,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457032598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:02,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676532838] [2024-11-10 15:02:02,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 15:02:02,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:02,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:02,574 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) [2024-11-10 15:02:02,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-10 15:02:02,674 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-10 15:02:02,674 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:02:02,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-10 15:02:02,683 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:02,788 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 14 treesize of output 10 [2024-11-10 15:02:05,324 INFO L349 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2024-11-10 15:02:05,324 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 39 [2024-11-10 15:02:05,487 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-10 15:02:05,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:05,954 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 27 treesize of output 23 [2024-11-10 15:02:05,958 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 15 treesize of output 11 [2024-11-10 15:02:05,969 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 15:02:05,969 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 43 treesize of output 47 [2024-11-10 15:02:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-10 15:02:06,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676532838] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:02:06,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:02:06,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 36 [2024-11-10 15:02:06,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60004819] [2024-11-10 15:02:06,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:02:06,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-10 15:02:06,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:06,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-10 15:02:06,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1134, Unknown=1, NotChecked=0, Total=1260 [2024-11-10 15:02:06,144 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 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) [2024-11-10 15:02:09,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-10 15:02:12,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-10 15:02:14,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:14,421 INFO L93 Difference]: Finished difference Result 165 states and 185 transitions. [2024-11-10 15:02:14,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-10 15:02:14,422 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 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 [2024-11-10 15:02:14,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:14,424 INFO L225 Difference]: With dead ends: 165 [2024-11-10 15:02:14,424 INFO L226 Difference]: Without dead ends: 165 [2024-11-10 15:02:14,425 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=402, Invalid=3137, Unknown=1, NotChecked=0, Total=3540 [2024-11-10 15:02:14,427 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 160 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 8 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:14,428 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 1576 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1272 Invalid, 3 Unknown, 0 Unchecked, 7.2s Time] [2024-11-10 15:02:14,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-11-10 15:02:14,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 119. [2024-11-10 15:02:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 107 states have (on average 1.2523364485981308) internal successors, (134), 118 states have internal predecessors, (134), 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) [2024-11-10 15:02:14,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 134 transitions. [2024-11-10 15:02:14,431 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 134 transitions. Word has length 41 [2024-11-10 15:02:14,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:14,432 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 134 transitions. [2024-11-10 15:02:14,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 36 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) [2024-11-10 15:02:14,432 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 134 transitions. [2024-11-10 15:02:14,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-10 15:02:14,432 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:14,433 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:14,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-10 15:02:14,633 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 [2024-11-10 15:02:14,633 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:14,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:14,634 INFO L85 PathProgramCache]: Analyzing trace with hash -669519457, now seen corresponding path program 1 times [2024-11-10 15:02:14,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:14,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029925941] [2024-11-10 15:02:14,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:14,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:14,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:14,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029925941] [2024-11-10 15:02:14,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029925941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:14,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587866684] [2024-11-10 15:02:14,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:14,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:14,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:14,879 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) [2024-11-10 15:02:14,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-10 15:02:14,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:14,981 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-10 15:02:14,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:15,011 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 [2024-11-10 15:02:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-10 15:02:15,043 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 15:02:15,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587866684] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:02:15,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 15:02:15,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 11 [2024-11-10 15:02:15,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657318781] [2024-11-10 15:02:15,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:02:15,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 15:02:15,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:15,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 15:02:15,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-10 15:02:15,045 INFO L87 Difference]: Start difference. First operand 119 states and 134 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2024-11-10 15:02:15,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:15,100 INFO L93 Difference]: Finished difference Result 187 states and 209 transitions. [2024-11-10 15:02:15,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-10 15:02:15,100 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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 42 [2024-11-10 15:02:15,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:15,101 INFO L225 Difference]: With dead ends: 187 [2024-11-10 15:02:15,101 INFO L226 Difference]: Without dead ends: 160 [2024-11-10 15:02:15,101 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-10 15:02:15,102 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 2 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:15,102 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 411 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:02:15,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-10 15:02:15,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2024-11-10 15:02:15,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 147 states have (on average 1.1972789115646258) internal successors, (176), 158 states have internal predecessors, (176), 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) [2024-11-10 15:02:15,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 176 transitions. [2024-11-10 15:02:15,106 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 176 transitions. Word has length 42 [2024-11-10 15:02:15,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:15,106 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 176 transitions. [2024-11-10 15:02:15,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 8 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) [2024-11-10 15:02:15,106 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 176 transitions. [2024-11-10 15:02:15,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-10 15:02:15,107 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:15,107 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:15,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-10 15:02:15,307 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 [2024-11-10 15:02:15,308 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:15,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:15,309 INFO L85 PathProgramCache]: Analyzing trace with hash 792060542, now seen corresponding path program 1 times [2024-11-10 15:02:15,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:15,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403082229] [2024-11-10 15:02:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:15,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:15,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:15,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403082229] [2024-11-10 15:02:15,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403082229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:15,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781397577] [2024-11-10 15:02:15,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:15,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:15,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:15,589 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) [2024-11-10 15:02:15,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-10 15:02:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:15,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-10 15:02:15,687 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:15,761 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 [2024-11-10 15:02:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:15,793 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:15,818 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 13 treesize of output 11 [2024-11-10 15:02:15,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-11-10 15:02:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:15,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781397577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:02:15,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:02:15,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2024-11-10 15:02:15,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625869803] [2024-11-10 15:02:15,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:02:15,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-10 15:02:15,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:15,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-10 15:02:15,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-11-10 15:02:15,888 INFO L87 Difference]: Start difference. First operand 159 states and 176 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 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) [2024-11-10 15:02:16,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:16,038 INFO L93 Difference]: Finished difference Result 233 states and 258 transitions. [2024-11-10 15:02:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-10 15:02:16,039 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 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 42 [2024-11-10 15:02:16,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:16,040 INFO L225 Difference]: With dead ends: 233 [2024-11-10 15:02:16,040 INFO L226 Difference]: Without dead ends: 206 [2024-11-10 15:02:16,041 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2024-11-10 15:02:16,041 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 39 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:16,041 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 523 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:02:16,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-10 15:02:16,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 163. [2024-11-10 15:02:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 151 states have (on average 1.1986754966887416) internal successors, (181), 162 states have internal predecessors, (181), 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) [2024-11-10 15:02:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 181 transitions. [2024-11-10 15:02:16,046 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 181 transitions. Word has length 42 [2024-11-10 15:02:16,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:16,046 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 181 transitions. [2024-11-10 15:02:16,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 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) [2024-11-10 15:02:16,046 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 181 transitions. [2024-11-10 15:02:16,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-10 15:02:16,047 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:16,047 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:16,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-10 15:02:16,251 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 [2024-11-10 15:02:16,252 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:16,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:16,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2099067168, now seen corresponding path program 2 times [2024-11-10 15:02:16,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:16,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478487526] [2024-11-10 15:02:16,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:16,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:16,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:16,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478487526] [2024-11-10 15:02:16,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478487526] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:16,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969910781] [2024-11-10 15:02:16,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 15:02:16,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:16,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:16,454 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) [2024-11-10 15:02:16,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-10 15:02:16,561 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 15:02:16,561 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:02:16,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-10 15:02:16,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:16,714 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:16,891 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 [2024-11-10 15:02:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:16,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969910781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:02:16,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:02:16,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2024-11-10 15:02:16,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254775806] [2024-11-10 15:02:16,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:02:16,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-10 15:02:16,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:16,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-10 15:02:16,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-11-10 15:02:16,950 INFO L87 Difference]: Start difference. First operand 163 states and 181 transitions. Second operand has 20 states, 19 states have (on average 4.842105263157895) internal successors, (92), 20 states have internal predecessors, (92), 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) [2024-11-10 15:02:17,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:17,296 INFO L93 Difference]: Finished difference Result 198 states and 220 transitions. [2024-11-10 15:02:17,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 15:02:17,296 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.842105263157895) internal successors, (92), 20 states have internal predecessors, (92), 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 46 [2024-11-10 15:02:17,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:17,297 INFO L225 Difference]: With dead ends: 198 [2024-11-10 15:02:17,297 INFO L226 Difference]: Without dead ends: 198 [2024-11-10 15:02:17,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-11-10 15:02:17,298 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 37 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:17,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 828 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-10 15:02:17,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-11-10 15:02:17,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 186. [2024-11-10 15:02:17,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 174 states have (on average 1.2586206896551724) internal successors, (219), 185 states have internal predecessors, (219), 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) [2024-11-10 15:02:17,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 219 transitions. [2024-11-10 15:02:17,301 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 219 transitions. Word has length 46 [2024-11-10 15:02:17,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:17,301 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 219 transitions. [2024-11-10 15:02:17,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.842105263157895) internal successors, (92), 20 states have internal predecessors, (92), 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) [2024-11-10 15:02:17,301 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 219 transitions. [2024-11-10 15:02:17,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-10 15:02:17,302 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:17,302 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:17,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-10 15:02:17,502 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 [2024-11-10 15:02:17,503 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:17,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:17,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1429851037, now seen corresponding path program 1 times [2024-11-10 15:02:17,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:17,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444572027] [2024-11-10 15:02:17,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:17,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-10 15:02:17,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:17,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444572027] [2024-11-10 15:02:17,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444572027] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:02:17,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:02:17,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 15:02:17,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333378717] [2024-11-10 15:02:17,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:02:17,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 15:02:17,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:17,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 15:02:17,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-10 15:02:17,576 INFO L87 Difference]: Start difference. First operand 186 states and 219 transitions. Second operand has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 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) [2024-11-10 15:02:17,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:17,628 INFO L93 Difference]: Finished difference Result 186 states and 217 transitions. [2024-11-10 15:02:17,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 15:02:17,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 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 48 [2024-11-10 15:02:17,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:17,629 INFO L225 Difference]: With dead ends: 186 [2024-11-10 15:02:17,629 INFO L226 Difference]: Without dead ends: 186 [2024-11-10 15:02:17,629 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-10 15:02:17,630 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 49 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:17,630 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 125 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:02:17,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-10 15:02:17,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2024-11-10 15:02:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 174 states have (on average 1.235632183908046) internal successors, (215), 183 states have internal predecessors, (215), 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) [2024-11-10 15:02:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 215 transitions. [2024-11-10 15:02:17,633 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 215 transitions. Word has length 48 [2024-11-10 15:02:17,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:17,634 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 215 transitions. [2024-11-10 15:02:17,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.25) internal successors, (41), 5 states have internal predecessors, (41), 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) [2024-11-10 15:02:17,634 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 215 transitions. [2024-11-10 15:02:17,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-10 15:02:17,634 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:17,634 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:17,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-10 15:02:17,635 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:17,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:17,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1429851038, now seen corresponding path program 1 times [2024-11-10 15:02:17,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:17,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293430839] [2024-11-10 15:02:17,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:17,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:17,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:17,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293430839] [2024-11-10 15:02:17,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293430839] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:17,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264164603] [2024-11-10 15:02:17,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:17,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:17,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:17,868 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) [2024-11-10 15:02:17,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-10 15:02:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:17,971 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-10 15:02:17,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:18,099 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:18,303 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 7 treesize of output 5 [2024-11-10 15:02:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:18,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264164603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:02:18,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:02:18,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-10 15:02:18,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029752895] [2024-11-10 15:02:18,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:02:18,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 15:02:18,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:18,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 15:02:18,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-10 15:02:18,331 INFO L87 Difference]: Start difference. First operand 184 states and 215 transitions. Second operand has 19 states, 18 states have (on average 5.944444444444445) internal successors, (107), 19 states have internal predecessors, (107), 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) [2024-11-10 15:02:18,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:18,537 INFO L93 Difference]: Finished difference Result 201 states and 224 transitions. [2024-11-10 15:02:18,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 15:02:18,537 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.944444444444445) internal successors, (107), 19 states have internal predecessors, (107), 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 48 [2024-11-10 15:02:18,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:18,538 INFO L225 Difference]: With dead ends: 201 [2024-11-10 15:02:18,538 INFO L226 Difference]: Without dead ends: 201 [2024-11-10 15:02:18,538 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-10 15:02:18,539 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 107 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:18,539 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 484 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-10 15:02:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-11-10 15:02:18,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 185. [2024-11-10 15:02:18,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 176 states have (on average 1.2215909090909092) internal successors, (215), 184 states have internal predecessors, (215), 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) [2024-11-10 15:02:18,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 215 transitions. [2024-11-10 15:02:18,542 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 215 transitions. Word has length 48 [2024-11-10 15:02:18,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:18,543 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 215 transitions. [2024-11-10 15:02:18,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.944444444444445) internal successors, (107), 19 states have internal predecessors, (107), 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) [2024-11-10 15:02:18,543 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 215 transitions. [2024-11-10 15:02:18,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-10 15:02:18,543 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:18,544 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:18,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-10 15:02:18,744 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,SelfDestructingSolverStorable26 [2024-11-10 15:02:18,744 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:18,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:18,745 INFO L85 PathProgramCache]: Analyzing trace with hash -302687846, now seen corresponding path program 1 times [2024-11-10 15:02:18,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:18,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522115437] [2024-11-10 15:02:18,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:18,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-10 15:02:18,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:18,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522115437] [2024-11-10 15:02:18,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522115437] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:02:18,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:02:18,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 15:02:18,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209299682] [2024-11-10 15:02:18,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:02:18,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 15:02:18,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:18,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 15:02:18,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-10 15:02:18,841 INFO L87 Difference]: Start difference. First operand 185 states and 215 transitions. Second operand has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 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) [2024-11-10 15:02:18,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:18,909 INFO L93 Difference]: Finished difference Result 186 states and 215 transitions. [2024-11-10 15:02:18,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 15:02:18,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 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 50 [2024-11-10 15:02:18,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:18,910 INFO L225 Difference]: With dead ends: 186 [2024-11-10 15:02:18,910 INFO L226 Difference]: Without dead ends: 186 [2024-11-10 15:02:18,910 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-10 15:02:18,911 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 47 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:18,911 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 186 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:02:18,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-11-10 15:02:18,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2024-11-10 15:02:18,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 176 states have (on average 1.2102272727272727) internal successors, (213), 183 states have internal predecessors, (213), 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) [2024-11-10 15:02:18,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 213 transitions. [2024-11-10 15:02:18,914 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 213 transitions. Word has length 50 [2024-11-10 15:02:18,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:18,914 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 213 transitions. [2024-11-10 15:02:18,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.0) internal successors, (40), 6 states have internal predecessors, (40), 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) [2024-11-10 15:02:18,915 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 213 transitions. [2024-11-10 15:02:18,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-10 15:02:18,915 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:18,915 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:18,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-10 15:02:18,916 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:18,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:18,916 INFO L85 PathProgramCache]: Analyzing trace with hash -302687845, now seen corresponding path program 1 times [2024-11-10 15:02:18,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:18,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121206396] [2024-11-10 15:02:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:18,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:19,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:19,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121206396] [2024-11-10 15:02:19,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121206396] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:19,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350180237] [2024-11-10 15:02:19,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:19,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:19,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:19,272 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) [2024-11-10 15:02:19,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-10 15:02:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:19,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-10 15:02:19,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:19,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:19,672 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 7 treesize of output 5 [2024-11-10 15:02:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:19,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350180237] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:02:19,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:02:19,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 20 [2024-11-10 15:02:19,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041704501] [2024-11-10 15:02:19,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:02:19,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-10 15:02:19,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:19,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-10 15:02:19,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-10 15:02:19,705 INFO L87 Difference]: Start difference. First operand 184 states and 213 transitions. Second operand has 21 states, 20 states have (on average 5.0) internal successors, (100), 21 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) [2024-11-10 15:02:19,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:19,938 INFO L93 Difference]: Finished difference Result 197 states and 226 transitions. [2024-11-10 15:02:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 15:02:19,939 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.0) internal successors, (100), 21 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 50 [2024-11-10 15:02:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:19,940 INFO L225 Difference]: With dead ends: 197 [2024-11-10 15:02:19,940 INFO L226 Difference]: Without dead ends: 197 [2024-11-10 15:02:19,940 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2024-11-10 15:02:19,941 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 81 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:19,941 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 434 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-10 15:02:19,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-10 15:02:19,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 190. [2024-11-10 15:02:19,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 182 states have (on average 1.2087912087912087) internal successors, (220), 189 states have internal predecessors, (220), 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) [2024-11-10 15:02:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 220 transitions. [2024-11-10 15:02:19,944 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 220 transitions. Word has length 50 [2024-11-10 15:02:19,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:19,944 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 220 transitions. [2024-11-10 15:02:19,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.0) internal successors, (100), 21 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) [2024-11-10 15:02:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 220 transitions. [2024-11-10 15:02:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-10 15:02:19,945 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:19,945 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:19,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-10 15:02:20,145 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,SelfDestructingSolverStorable28 [2024-11-10 15:02:20,145 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:20,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:20,146 INFO L85 PathProgramCache]: Analyzing trace with hash 628060129, now seen corresponding path program 4 times [2024-11-10 15:02:20,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:20,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826353946] [2024-11-10 15:02:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:20,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:02:20,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:20,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826353946] [2024-11-10 15:02:20,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826353946] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:20,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916182108] [2024-11-10 15:02:20,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 15:02:20,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:20,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:20,792 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) [2024-11-10 15:02:20,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-10 15:02:20,889 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 15:02:20,889 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:02:20,890 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-10 15:02:20,893 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:21,082 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 14 treesize of output 10 [2024-11-10 15:02:21,524 INFO L349 Elim1Store]: treesize reduction 17, result has 48.5 percent of original size [2024-11-10 15:02:21,525 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 34 [2024-11-10 15:02:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 15:02:21,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:21,871 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 59 treesize of output 51 [2024-11-10 15:02:21,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 15:02:21,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 45 [2024-11-10 15:02:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 24 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 15:02:22,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916182108] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:02:22,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:02:22,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 50 [2024-11-10 15:02:22,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267677566] [2024-11-10 15:02:22,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:02:22,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-10 15:02:22,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:22,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-10 15:02:22,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2266, Unknown=0, NotChecked=0, Total=2450 [2024-11-10 15:02:22,189 INFO L87 Difference]: Start difference. First operand 190 states and 220 transitions. Second operand has 50 states, 50 states have (on average 2.56) internal successors, (128), 50 states have internal predecessors, (128), 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) [2024-11-10 15:02:23,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:23,841 INFO L93 Difference]: Finished difference Result 305 states and 355 transitions. [2024-11-10 15:02:23,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-10 15:02:23,841 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.56) internal successors, (128), 50 states have internal predecessors, (128), 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 51 [2024-11-10 15:02:23,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:23,842 INFO L225 Difference]: With dead ends: 305 [2024-11-10 15:02:23,842 INFO L226 Difference]: Without dead ends: 289 [2024-11-10 15:02:23,843 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=455, Invalid=4515, Unknown=0, NotChecked=0, Total=4970 [2024-11-10 15:02:23,844 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 241 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 1138 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:23,844 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 1138 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-10 15:02:23,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-10 15:02:23,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 208. [2024-11-10 15:02:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 200 states have (on average 1.2) internal successors, (240), 207 states have internal predecessors, (240), 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) [2024-11-10 15:02:23,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 240 transitions. [2024-11-10 15:02:23,848 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 240 transitions. Word has length 51 [2024-11-10 15:02:23,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:23,848 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 240 transitions. [2024-11-10 15:02:23,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.56) internal successors, (128), 50 states have internal predecessors, (128), 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) [2024-11-10 15:02:23,849 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 240 transitions. [2024-11-10 15:02:23,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-10 15:02:23,849 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:23,850 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:23,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-10 15:02:24,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:24,050 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:24,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:24,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1474114421, now seen corresponding path program 3 times [2024-11-10 15:02:24,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:24,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792258880] [2024-11-10 15:02:24,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:24,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:24,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:24,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792258880] [2024-11-10 15:02:24,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792258880] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:24,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557558320] [2024-11-10 15:02:24,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 15:02:24,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:24,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:24,438 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) [2024-11-10 15:02:24,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-10 15:02:24,565 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-10 15:02:24,565 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:02:24,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-10 15:02:24,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:24,674 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 13 treesize of output 9 [2024-11-10 15:02:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:24,729 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:24,753 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 13 [2024-11-10 15:02:24,754 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 16 treesize of output 12 [2024-11-10 15:02:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:24,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557558320] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:02:24,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:02:24,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 23 [2024-11-10 15:02:24,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863378826] [2024-11-10 15:02:24,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:02:24,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-10 15:02:24,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:24,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-10 15:02:24,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2024-11-10 15:02:24,813 INFO L87 Difference]: Start difference. First operand 208 states and 240 transitions. Second operand has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 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) [2024-11-10 15:02:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:25,005 INFO L93 Difference]: Finished difference Result 329 states and 376 transitions. [2024-11-10 15:02:25,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-10 15:02:25,006 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 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 51 [2024-11-10 15:02:25,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:25,007 INFO L225 Difference]: With dead ends: 329 [2024-11-10 15:02:25,007 INFO L226 Difference]: Without dead ends: 320 [2024-11-10 15:02:25,007 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2024-11-10 15:02:25,008 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 42 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:25,008 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 900 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:02:25,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2024-11-10 15:02:25,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 311. [2024-11-10 15:02:25,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 303 states have (on average 1.1914191419141915) internal successors, (361), 310 states have internal predecessors, (361), 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) [2024-11-10 15:02:25,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 361 transitions. [2024-11-10 15:02:25,015 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 361 transitions. Word has length 51 [2024-11-10 15:02:25,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:25,015 INFO L471 AbstractCegarLoop]: Abstraction has 311 states and 361 transitions. [2024-11-10 15:02:25,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.608695652173913) internal successors, (83), 23 states have internal predecessors, (83), 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) [2024-11-10 15:02:25,015 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 361 transitions. [2024-11-10 15:02:25,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-10 15:02:25,016 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:25,016 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:25,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-10 15:02:25,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:25,221 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:25,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:25,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1174756299, now seen corresponding path program 1 times [2024-11-10 15:02:25,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:25,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567138663] [2024-11-10 15:02:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:25,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-10 15:02:25,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:25,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567138663] [2024-11-10 15:02:25,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567138663] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:02:25,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:02:25,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 15:02:25,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267306698] [2024-11-10 15:02:25,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:02:25,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 15:02:25,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:25,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 15:02:25,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-10 15:02:25,316 INFO L87 Difference]: Start difference. First operand 311 states and 361 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 6 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) [2024-11-10 15:02:25,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:25,386 INFO L93 Difference]: Finished difference Result 312 states and 360 transitions. [2024-11-10 15:02:25,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 15:02:25,386 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 6 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 52 [2024-11-10 15:02:25,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:25,387 INFO L225 Difference]: With dead ends: 312 [2024-11-10 15:02:25,388 INFO L226 Difference]: Without dead ends: 312 [2024-11-10 15:02:25,388 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-10 15:02:25,388 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 41 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:25,389 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 163 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:02:25,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2024-11-10 15:02:25,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 310. [2024-11-10 15:02:25,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 303 states have (on average 1.1815181518151816) internal successors, (358), 309 states have internal predecessors, (358), 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) [2024-11-10 15:02:25,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 358 transitions. [2024-11-10 15:02:25,398 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 358 transitions. Word has length 52 [2024-11-10 15:02:25,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:25,398 INFO L471 AbstractCegarLoop]: Abstraction has 310 states and 358 transitions. [2024-11-10 15:02:25,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 6 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) [2024-11-10 15:02:25,398 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 358 transitions. [2024-11-10 15:02:25,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-10 15:02:25,399 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:25,399 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:25,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-11-10 15:02:25,399 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:25,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1174756300, now seen corresponding path program 1 times [2024-11-10 15:02:25,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:25,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760103989] [2024-11-10 15:02:25,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:25,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:25,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:25,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760103989] [2024-11-10 15:02:25,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760103989] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:25,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868839202] [2024-11-10 15:02:25,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:25,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:25,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:25,670 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) [2024-11-10 15:02:25,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-10 15:02:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:25,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-10 15:02:25,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:25,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:26,192 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 7 treesize of output 5 [2024-11-10 15:02:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:26,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868839202] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:02:26,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:02:26,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-10 15:02:26,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219709198] [2024-11-10 15:02:26,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:02:26,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-10 15:02:26,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:26,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-10 15:02:26,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2024-11-10 15:02:26,216 INFO L87 Difference]: Start difference. First operand 310 states and 358 transitions. Second operand has 21 states, 20 states have (on average 5.75) internal successors, (115), 21 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) [2024-11-10 15:02:26,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:26,473 INFO L93 Difference]: Finished difference Result 321 states and 364 transitions. [2024-11-10 15:02:26,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-10 15:02:26,473 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.75) internal successors, (115), 21 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) Word has length 52 [2024-11-10 15:02:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:26,474 INFO L225 Difference]: With dead ends: 321 [2024-11-10 15:02:26,474 INFO L226 Difference]: Without dead ends: 321 [2024-11-10 15:02:26,475 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-11-10 15:02:26,475 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 126 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:26,475 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 369 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-10 15:02:26,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2024-11-10 15:02:26,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 309. [2024-11-10 15:02:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 303 states have (on average 1.1716171617161717) internal successors, (355), 308 states have internal predecessors, (355), 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) [2024-11-10 15:02:26,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 355 transitions. [2024-11-10 15:02:26,480 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 355 transitions. Word has length 52 [2024-11-10 15:02:26,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:26,481 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 355 transitions. [2024-11-10 15:02:26,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.75) internal successors, (115), 21 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) [2024-11-10 15:02:26,481 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 355 transitions. [2024-11-10 15:02:26,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-10 15:02:26,481 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:26,481 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:26,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-10 15:02:26,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:26,686 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:26,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:26,686 INFO L85 PathProgramCache]: Analyzing trace with hash -635645484, now seen corresponding path program 1 times [2024-11-10 15:02:26,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:26,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329438221] [2024-11-10 15:02:26,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:26,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-10 15:02:26,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:26,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329438221] [2024-11-10 15:02:26,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329438221] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:02:26,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:02:26,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 15:02:26,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388255243] [2024-11-10 15:02:26,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:02:26,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 15:02:26,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:26,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 15:02:26,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-10 15:02:26,776 INFO L87 Difference]: Start difference. First operand 309 states and 355 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 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) [2024-11-10 15:02:26,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:26,839 INFO L93 Difference]: Finished difference Result 310 states and 354 transitions. [2024-11-10 15:02:26,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 15:02:26,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 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) Word has length 54 [2024-11-10 15:02:26,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:26,841 INFO L225 Difference]: With dead ends: 310 [2024-11-10 15:02:26,841 INFO L226 Difference]: Without dead ends: 310 [2024-11-10 15:02:26,841 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-10 15:02:26,842 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 39 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:26,842 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 183 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:02:26,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2024-11-10 15:02:26,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 308. [2024-11-10 15:02:26,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 303 states have (on average 1.1617161716171618) internal successors, (352), 307 states have internal predecessors, (352), 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) [2024-11-10 15:02:26,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 352 transitions. [2024-11-10 15:02:26,847 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 352 transitions. Word has length 54 [2024-11-10 15:02:26,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:26,848 INFO L471 AbstractCegarLoop]: Abstraction has 308 states and 352 transitions. [2024-11-10 15:02:26,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 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) [2024-11-10 15:02:26,848 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 352 transitions. [2024-11-10 15:02:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-10 15:02:26,849 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:26,849 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:26,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-10 15:02:26,849 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:26,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:26,849 INFO L85 PathProgramCache]: Analyzing trace with hash -635645483, now seen corresponding path program 1 times [2024-11-10 15:02:26,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:26,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566994988] [2024-11-10 15:02:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:26,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:27,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:27,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566994988] [2024-11-10 15:02:27,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566994988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:27,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020838965] [2024-11-10 15:02:27,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:27,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:27,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:27,124 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) [2024-11-10 15:02:27,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-10 15:02:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:27,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-10 15:02:27,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:27,386 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:27,545 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 7 treesize of output 5 [2024-11-10 15:02:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:27,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020838965] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:02:27,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:02:27,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2024-11-10 15:02:27,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986712375] [2024-11-10 15:02:27,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:02:27,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-10 15:02:27,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:27,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-10 15:02:27,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-11-10 15:02:27,564 INFO L87 Difference]: Start difference. First operand 308 states and 352 transitions. Second operand has 19 states, 18 states have (on average 5.166666666666667) internal successors, (93), 19 states have internal predecessors, (93), 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) [2024-11-10 15:02:27,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:27,747 INFO L93 Difference]: Finished difference Result 346 states and 397 transitions. [2024-11-10 15:02:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 15:02:27,747 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.166666666666667) internal successors, (93), 19 states have internal predecessors, (93), 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 54 [2024-11-10 15:02:27,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:27,748 INFO L225 Difference]: With dead ends: 346 [2024-11-10 15:02:27,748 INFO L226 Difference]: Without dead ends: 343 [2024-11-10 15:02:27,748 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-11-10 15:02:27,749 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 180 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:27,749 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 353 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-10 15:02:27,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-11-10 15:02:27,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 317. [2024-11-10 15:02:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 312 states have (on average 1.1634615384615385) internal successors, (363), 316 states have internal predecessors, (363), 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) [2024-11-10 15:02:27,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 363 transitions. [2024-11-10 15:02:27,754 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 363 transitions. Word has length 54 [2024-11-10 15:02:27,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:27,755 INFO L471 AbstractCegarLoop]: Abstraction has 317 states and 363 transitions. [2024-11-10 15:02:27,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.166666666666667) internal successors, (93), 19 states have internal predecessors, (93), 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) [2024-11-10 15:02:27,755 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 363 transitions. [2024-11-10 15:02:27,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-10 15:02:27,756 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:27,756 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:27,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-10 15:02:27,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-10 15:02:27,961 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:27,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:27,961 INFO L85 PathProgramCache]: Analyzing trace with hash 709112579, now seen corresponding path program 5 times [2024-11-10 15:02:27,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:27,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41124743] [2024-11-10 15:02:27,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:27,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:02:28,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:28,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41124743] [2024-11-10 15:02:28,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41124743] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:28,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758056574] [2024-11-10 15:02:28,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 15:02:28,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:28,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:28,417 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) [2024-11-10 15:02:28,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-10 15:02:28,563 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-10 15:02:28,564 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:02:28,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-10 15:02:28,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:28,735 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 13 treesize of output 9 [2024-11-10 15:02:28,782 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:02:28,783 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:28,810 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 13 [2024-11-10 15:02:28,812 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 16 treesize of output 12 [2024-11-10 15:02:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:02:28,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758056574] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:02:28,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:02:28,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 30 [2024-11-10 15:02:28,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627994812] [2024-11-10 15:02:28,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:02:28,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-10 15:02:28,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:28,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-10 15:02:28,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2024-11-10 15:02:28,916 INFO L87 Difference]: Start difference. First operand 317 states and 363 transitions. Second operand has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 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) [2024-11-10 15:02:29,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:29,570 INFO L93 Difference]: Finished difference Result 495 states and 568 transitions. [2024-11-10 15:02:29,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-10 15:02:29,574 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 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 55 [2024-11-10 15:02:29,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:29,575 INFO L225 Difference]: With dead ends: 495 [2024-11-10 15:02:29,576 INFO L226 Difference]: Without dead ends: 476 [2024-11-10 15:02:29,576 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=1715, Unknown=0, NotChecked=0, Total=1892 [2024-11-10 15:02:29,577 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 87 mSDsluCounter, 1945 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 2047 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:29,577 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 2047 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-10 15:02:29,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2024-11-10 15:02:29,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 349. [2024-11-10 15:02:29,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 344 states have (on average 1.1598837209302326) internal successors, (399), 348 states have internal predecessors, (399), 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) [2024-11-10 15:02:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 399 transitions. [2024-11-10 15:02:29,587 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 399 transitions. Word has length 55 [2024-11-10 15:02:29,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:29,588 INFO L471 AbstractCegarLoop]: Abstraction has 349 states and 399 transitions. [2024-11-10 15:02:29,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 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) [2024-11-10 15:02:29,588 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 399 transitions. [2024-11-10 15:02:29,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-10 15:02:29,589 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:29,589 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:29,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-10 15:02:29,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-10 15:02:29,792 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:29,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:29,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1385045331, now seen corresponding path program 4 times [2024-11-10 15:02:29,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:29,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211030623] [2024-11-10 15:02:29,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:29,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 15:02:30,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:30,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211030623] [2024-11-10 15:02:30,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211030623] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:30,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668862426] [2024-11-10 15:02:30,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 15:02:30,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:30,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:30,048 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) [2024-11-10 15:02:30,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-10 15:02:30,197 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 15:02:30,198 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:02:30,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-10 15:02:30,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:30,330 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 14 treesize of output 10 [2024-11-10 15:02:30,821 INFO L349 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2024-11-10 15:02:30,821 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 2 case distinctions, treesize of input 30 treesize of output 28 [2024-11-10 15:02:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-10 15:02:30,940 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:31,531 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 29 treesize of output 25 [2024-11-10 15:02:31,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2024-11-10 15:02:31,963 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 49 treesize of output 41 [2024-11-10 15:02:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 15:02:32,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668862426] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:02:32,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:02:32,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 17] total 38 [2024-11-10 15:02:32,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469920759] [2024-11-10 15:02:32,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:02:32,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-10 15:02:32,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:32,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-10 15:02:32,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2024-11-10 15:02:32,054 INFO L87 Difference]: Start difference. First operand 349 states and 399 transitions. Second operand has 39 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 39 states have internal predecessors, (127), 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) [2024-11-10 15:02:33,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:33,536 INFO L93 Difference]: Finished difference Result 358 states and 401 transitions. [2024-11-10 15:02:33,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-10 15:02:33,536 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 39 states have internal predecessors, (127), 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 55 [2024-11-10 15:02:33,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:33,537 INFO L225 Difference]: With dead ends: 358 [2024-11-10 15:02:33,537 INFO L226 Difference]: Without dead ends: 358 [2024-11-10 15:02:33,538 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=445, Invalid=3461, Unknown=0, NotChecked=0, Total=3906 [2024-11-10 15:02:33,538 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 249 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:33,539 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 1254 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-10 15:02:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2024-11-10 15:02:33,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 324. [2024-11-10 15:02:33,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 320 states have (on average 1.146875) internal successors, (367), 323 states have internal predecessors, (367), 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) [2024-11-10 15:02:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 367 transitions. [2024-11-10 15:02:33,543 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 367 transitions. Word has length 55 [2024-11-10 15:02:33,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:33,543 INFO L471 AbstractCegarLoop]: Abstraction has 324 states and 367 transitions. [2024-11-10 15:02:33,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 39 states have internal predecessors, (127), 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) [2024-11-10 15:02:33,544 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 367 transitions. [2024-11-10 15:02:33,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-10 15:02:33,544 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:33,545 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:33,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-10 15:02:33,745 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-10 15:02:33,745 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:33,746 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:33,746 INFO L85 PathProgramCache]: Analyzing trace with hash -922239035, now seen corresponding path program 1 times [2024-11-10 15:02:33,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:33,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771520348] [2024-11-10 15:02:33,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:33,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-10 15:02:33,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:33,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771520348] [2024-11-10 15:02:33,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771520348] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 15:02:33,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 15:02:33,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 15:02:33,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453556975] [2024-11-10 15:02:33,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 15:02:33,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 15:02:33,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:33,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 15:02:33,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-10 15:02:33,849 INFO L87 Difference]: Start difference. First operand 324 states and 367 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 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) [2024-11-10 15:02:33,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:33,885 INFO L93 Difference]: Finished difference Result 372 states and 420 transitions. [2024-11-10 15:02:33,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 15:02:33,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 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 56 [2024-11-10 15:02:33,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:33,887 INFO L225 Difference]: With dead ends: 372 [2024-11-10 15:02:33,887 INFO L226 Difference]: Without dead ends: 322 [2024-11-10 15:02:33,888 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-10 15:02:33,888 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 5 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:33,888 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 274 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-10 15:02:33,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2024-11-10 15:02:33,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2024-11-10 15:02:33,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 318 states have (on average 1.128930817610063) internal successors, (359), 321 states have internal predecessors, (359), 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) [2024-11-10 15:02:33,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 359 transitions. [2024-11-10 15:02:33,893 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 359 transitions. Word has length 56 [2024-11-10 15:02:33,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:33,893 INFO L471 AbstractCegarLoop]: Abstraction has 322 states and 359 transitions. [2024-11-10 15:02:33,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 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) [2024-11-10 15:02:33,894 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 359 transitions. [2024-11-10 15:02:33,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-10 15:02:33,894 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:33,895 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:33,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-11-10 15:02:33,895 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:33,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:33,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1658754341, now seen corresponding path program 6 times [2024-11-10 15:02:33,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:33,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732685787] [2024-11-10 15:02:33,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:33,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:02:34,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:34,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732685787] [2024-11-10 15:02:34,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732685787] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:34,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346895517] [2024-11-10 15:02:34,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 15:02:34,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:34,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:34,329 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) [2024-11-10 15:02:34,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-10 15:02:34,505 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-10 15:02:34,505 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:02:34,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-10 15:02:34,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:34,513 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 [2024-11-10 15:02:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 50 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:02:34,768 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 50 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:02:35,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346895517] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:02:35,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:02:35,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2024-11-10 15:02:35,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927465367] [2024-11-10 15:02:35,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:02:35,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-10 15:02:35,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:35,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-10 15:02:35,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1884, Unknown=0, NotChecked=0, Total=2162 [2024-11-10 15:02:35,234 INFO L87 Difference]: Start difference. First operand 322 states and 359 transitions. Second operand has 47 states, 46 states have (on average 3.4782608695652173) internal successors, (160), 47 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) [2024-11-10 15:02:35,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:35,779 INFO L93 Difference]: Finished difference Result 417 states and 470 transitions. [2024-11-10 15:02:35,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-10 15:02:35,779 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.4782608695652173) internal successors, (160), 47 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) Word has length 59 [2024-11-10 15:02:35,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:35,781 INFO L225 Difference]: With dead ends: 417 [2024-11-10 15:02:35,781 INFO L226 Difference]: Without dead ends: 417 [2024-11-10 15:02:35,781 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=414, Invalid=2666, Unknown=0, NotChecked=0, Total=3080 [2024-11-10 15:02:35,782 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 86 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1108 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:35,782 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 1108 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-10 15:02:35,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2024-11-10 15:02:35,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 331. [2024-11-10 15:02:35,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 327 states have (on average 1.1314984709480123) internal successors, (370), 330 states have internal predecessors, (370), 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) [2024-11-10 15:02:35,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 370 transitions. [2024-11-10 15:02:35,787 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 370 transitions. Word has length 59 [2024-11-10 15:02:35,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:35,788 INFO L471 AbstractCegarLoop]: Abstraction has 331 states and 370 transitions. [2024-11-10 15:02:35,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.4782608695652173) internal successors, (160), 47 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) [2024-11-10 15:02:35,788 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 370 transitions. [2024-11-10 15:02:35,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-10 15:02:35,788 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:35,788 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:35,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-10 15:02:35,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:35,993 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:35,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:35,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1943125983, now seen corresponding path program 7 times [2024-11-10 15:02:35,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:35,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394636592] [2024-11-10 15:02:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:35,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 102 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:02:36,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:36,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394636592] [2024-11-10 15:02:36,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394636592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:36,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904285045] [2024-11-10 15:02:36,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 15:02:36,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:36,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:36,541 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:02:36,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-10 15:02:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:36,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-10 15:02:36,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:36,873 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 13 treesize of output 9 [2024-11-10 15:02:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 102 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:02:36,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:36,936 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 13 [2024-11-10 15:02:36,937 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 16 treesize of output 12 [2024-11-10 15:02:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 102 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:02:37,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904285045] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:02:37,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:02:37,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 33 [2024-11-10 15:02:37,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972746980] [2024-11-10 15:02:37,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:02:37,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-10 15:02:37,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:37,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-10 15:02:37,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2024-11-10 15:02:37,008 INFO L87 Difference]: Start difference. First operand 331 states and 370 transitions. Second operand has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 33 states have internal predecessors, (104), 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) [2024-11-10 15:02:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:37,598 INFO L93 Difference]: Finished difference Result 493 states and 552 transitions. [2024-11-10 15:02:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-10 15:02:37,598 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 33 states have internal predecessors, (104), 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 62 [2024-11-10 15:02:37,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:37,599 INFO L225 Difference]: With dead ends: 493 [2024-11-10 15:02:37,599 INFO L226 Difference]: Without dead ends: 471 [2024-11-10 15:02:37,600 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=1979, Unknown=0, NotChecked=0, Total=2162 [2024-11-10 15:02:37,600 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 92 mSDsluCounter, 1939 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 2041 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:37,600 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 2041 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-10 15:02:37,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2024-11-10 15:02:37,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 369. [2024-11-10 15:02:37,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 365 states have (on average 1.1287671232876713) internal successors, (412), 368 states have internal predecessors, (412), 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) [2024-11-10 15:02:37,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 412 transitions. [2024-11-10 15:02:37,607 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 412 transitions. Word has length 62 [2024-11-10 15:02:37,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:37,607 INFO L471 AbstractCegarLoop]: Abstraction has 369 states and 412 transitions. [2024-11-10 15:02:37,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 33 states have internal predecessors, (104), 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) [2024-11-10 15:02:37,607 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 412 transitions. [2024-11-10 15:02:37,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-10 15:02:37,608 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:37,608 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:37,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-10 15:02:37,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-10 15:02:37,811 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:37,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:37,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1439885511, now seen corresponding path program 1 times [2024-11-10 15:02:37,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:37,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359392040] [2024-11-10 15:02:37,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:37,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-10 15:02:37,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:37,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359392040] [2024-11-10 15:02:37,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359392040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:37,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009939473] [2024-11-10 15:02:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:37,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:37,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:37,949 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:02:37,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-10 15:02:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:38,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-10 15:02:38,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:38,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-10 15:02:38,174 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 8 treesize of output 1 [2024-11-10 15:02:38,365 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 16 treesize of output 8 [2024-11-10 15:02:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-10 15:02:38,385 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:38,639 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 14 [2024-11-10 15:02:38,642 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 13 [2024-11-10 15:02:38,644 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 16 treesize of output 12 [2024-11-10 15:02:38,717 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-10 15:02:38,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009939473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:02:38,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:02:38,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 17, 18] total 35 [2024-11-10 15:02:38,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250986248] [2024-11-10 15:02:38,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:02:38,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-10 15:02:38,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:38,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-10 15:02:38,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2024-11-10 15:02:38,719 INFO L87 Difference]: Start difference. First operand 369 states and 412 transitions. Second operand has 35 states, 35 states have (on average 3.657142857142857) internal successors, (128), 35 states have internal predecessors, (128), 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) [2024-11-10 15:02:39,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:39,411 INFO L93 Difference]: Finished difference Result 432 states and 477 transitions. [2024-11-10 15:02:39,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-10 15:02:39,412 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.657142857142857) internal successors, (128), 35 states have internal predecessors, (128), 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 63 [2024-11-10 15:02:39,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:39,413 INFO L225 Difference]: With dead ends: 432 [2024-11-10 15:02:39,413 INFO L226 Difference]: Without dead ends: 341 [2024-11-10 15:02:39,414 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=2418, Unknown=0, NotChecked=0, Total=2652 [2024-11-10 15:02:39,414 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 64 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:39,414 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 1117 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-10 15:02:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2024-11-10 15:02:39,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 280. [2024-11-10 15:02:39,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 276 states have (on average 1.1376811594202898) internal successors, (314), 279 states have internal predecessors, (314), 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) [2024-11-10 15:02:39,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 314 transitions. [2024-11-10 15:02:39,418 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 314 transitions. Word has length 63 [2024-11-10 15:02:39,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:39,418 INFO L471 AbstractCegarLoop]: Abstraction has 280 states and 314 transitions. [2024-11-10 15:02:39,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.657142857142857) internal successors, (128), 35 states have internal predecessors, (128), 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) [2024-11-10 15:02:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 314 transitions. [2024-11-10 15:02:39,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-10 15:02:39,421 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:39,421 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:39,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-10 15:02:39,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-11-10 15:02:39,621 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:39,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:39,622 INFO L85 PathProgramCache]: Analyzing trace with hash 115586017, now seen corresponding path program 1 times [2024-11-10 15:02:39,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:39,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917980450] [2024-11-10 15:02:39,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:39,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-10 15:02:39,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:39,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917980450] [2024-11-10 15:02:39,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917980450] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:39,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718644330] [2024-11-10 15:02:39,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:39,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:39,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:39,893 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:02:39,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-10 15:02:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:40,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-10 15:02:40,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-10 15:02:40,195 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:40,424 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 7 treesize of output 5 [2024-11-10 15:02:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-10 15:02:40,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718644330] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:02:40,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:02:40,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-11-10 15:02:40,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18958890] [2024-11-10 15:02:40,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:02:40,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-10 15:02:40,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:40,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-10 15:02:40,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2024-11-10 15:02:40,458 INFO L87 Difference]: Start difference. First operand 280 states and 314 transitions. Second operand has 23 states, 22 states have (on average 5.818181818181818) internal successors, (128), 23 states have internal predecessors, (128), 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) [2024-11-10 15:02:40,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:40,766 INFO L93 Difference]: Finished difference Result 382 states and 430 transitions. [2024-11-10 15:02:40,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-10 15:02:40,766 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.818181818181818) internal successors, (128), 23 states have internal predecessors, (128), 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 64 [2024-11-10 15:02:40,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:40,767 INFO L225 Difference]: With dead ends: 382 [2024-11-10 15:02:40,767 INFO L226 Difference]: Without dead ends: 382 [2024-11-10 15:02:40,767 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2024-11-10 15:02:40,767 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 120 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:40,768 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 743 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-10 15:02:40,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2024-11-10 15:02:40,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 334. [2024-11-10 15:02:40,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 330 states have (on average 1.1515151515151516) internal successors, (380), 333 states have internal predecessors, (380), 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) [2024-11-10 15:02:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 380 transitions. [2024-11-10 15:02:40,772 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 380 transitions. Word has length 64 [2024-11-10 15:02:40,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:40,773 INFO L471 AbstractCegarLoop]: Abstraction has 334 states and 380 transitions. [2024-11-10 15:02:40,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.818181818181818) internal successors, (128), 23 states have internal predecessors, (128), 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) [2024-11-10 15:02:40,773 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 380 transitions. [2024-11-10 15:02:40,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-10 15:02:40,773 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:40,774 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:40,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-10 15:02:40,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-11-10 15:02:40,978 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:40,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:40,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1365873599, now seen corresponding path program 8 times [2024-11-10 15:02:40,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:40,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169780153] [2024-11-10 15:02:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:40,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:41,463 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 55 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:02:41,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:41,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169780153] [2024-11-10 15:02:41,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169780153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:41,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205847423] [2024-11-10 15:02:41,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 15:02:41,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:41,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:41,466 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:02:41,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-10 15:02:41,624 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 15:02:41,624 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:02:41,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-10 15:02:41,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:02:41,931 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:42,189 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 21 treesize of output 17 [2024-11-10 15:02:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:02:42,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205847423] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:02:42,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:02:42,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 44 [2024-11-10 15:02:42,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398909248] [2024-11-10 15:02:42,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:02:42,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-10 15:02:42,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:42,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-10 15:02:42,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1712, Unknown=0, NotChecked=0, Total=1980 [2024-11-10 15:02:42,498 INFO L87 Difference]: Start difference. First operand 334 states and 380 transitions. Second operand has 45 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 45 states have internal predecessors, (168), 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) [2024-11-10 15:02:43,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:43,364 INFO L93 Difference]: Finished difference Result 483 states and 557 transitions. [2024-11-10 15:02:43,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-10 15:02:43,365 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 45 states have internal predecessors, (168), 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 66 [2024-11-10 15:02:43,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:43,366 INFO L225 Difference]: With dead ends: 483 [2024-11-10 15:02:43,366 INFO L226 Difference]: Without dead ends: 483 [2024-11-10 15:02:43,367 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=408, Invalid=2784, Unknown=0, NotChecked=0, Total=3192 [2024-11-10 15:02:43,367 INFO L432 NwaCegarLoop]: 95 mSDtfsCounter, 90 mSDsluCounter, 2089 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 2184 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:43,367 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 2184 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1771 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-10 15:02:43,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2024-11-10 15:02:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 340. [2024-11-10 15:02:43,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 336 states have (on average 1.1517857142857142) internal successors, (387), 339 states have internal predecessors, (387), 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) [2024-11-10 15:02:43,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 387 transitions. [2024-11-10 15:02:43,374 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 387 transitions. Word has length 66 [2024-11-10 15:02:43,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:43,374 INFO L471 AbstractCegarLoop]: Abstraction has 340 states and 387 transitions. [2024-11-10 15:02:43,375 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 45 states have internal predecessors, (168), 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) [2024-11-10 15:02:43,375 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 387 transitions. [2024-11-10 15:02:43,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-10 15:02:43,376 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:43,376 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:43,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-10 15:02:43,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:43,580 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:43,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:43,580 INFO L85 PathProgramCache]: Analyzing trace with hash 220234567, now seen corresponding path program 9 times [2024-11-10 15:02:43,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:43,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614251903] [2024-11-10 15:02:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:43,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 143 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 15:02:44,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:44,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614251903] [2024-11-10 15:02:44,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614251903] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:44,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255904388] [2024-11-10 15:02:44,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 15:02:44,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:44,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:44,190 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:02:44,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-10 15:02:44,354 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-10 15:02:44,355 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:02:44,356 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-10 15:02:44,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:44,618 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 14 treesize of output 10 [2024-11-10 15:02:45,345 INFO L349 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2024-11-10 15:02:45,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 59 [2024-11-10 15:02:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 80 proven. 65 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 15:02:45,560 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:46,460 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 44 treesize of output 38 [2024-11-10 15:02:46,476 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 15:02:46,477 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 68 treesize of output 78 [2024-11-10 15:02:46,486 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 15 treesize of output 11 [2024-11-10 15:02:46,865 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 21 proven. 124 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 15:02:46,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255904388] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:02:46,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:02:46,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 64 [2024-11-10 15:02:46,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601034304] [2024-11-10 15:02:46,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:02:46,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-10 15:02:46,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:02:46,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-10 15:02:46,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=3700, Unknown=0, NotChecked=0, Total=4032 [2024-11-10 15:02:46,868 INFO L87 Difference]: Start difference. First operand 340 states and 387 transitions. Second operand has 64 states, 64 states have (on average 2.703125) internal successors, (173), 64 states have internal predecessors, (173), 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) [2024-11-10 15:02:57,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:02:57,648 INFO L93 Difference]: Finished difference Result 704 states and 812 transitions. [2024-11-10 15:02:57,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-11-10 15:02:57,648 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.703125) internal successors, (173), 64 states have internal predecessors, (173), 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 69 [2024-11-10 15:02:57,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:02:57,650 INFO L225 Difference]: With dead ends: 704 [2024-11-10 15:02:57,651 INFO L226 Difference]: Without dead ends: 679 [2024-11-10 15:02:57,653 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3862 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1473, Invalid=12333, Unknown=0, NotChecked=0, Total=13806 [2024-11-10 15:02:57,654 INFO L432 NwaCegarLoop]: 113 mSDtfsCounter, 358 mSDsluCounter, 2734 mSDsCounter, 0 mSdLazyCounter, 2467 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 2847 SdHoareTripleChecker+Invalid, 2493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-10 15:02:57,654 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 2847 Invalid, 2493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2467 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-10 15:02:57,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2024-11-10 15:02:57,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 382. [2024-11-10 15:02:57,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 378 states have (on average 1.1507936507936507) internal successors, (435), 381 states have internal predecessors, (435), 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) [2024-11-10 15:02:57,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 435 transitions. [2024-11-10 15:02:57,662 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 435 transitions. Word has length 69 [2024-11-10 15:02:57,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:02:57,662 INFO L471 AbstractCegarLoop]: Abstraction has 382 states and 435 transitions. [2024-11-10 15:02:57,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.703125) internal successors, (173), 64 states have internal predecessors, (173), 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) [2024-11-10 15:02:57,662 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 435 transitions. [2024-11-10 15:02:57,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-10 15:02:57,663 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:02:57,664 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:02:57,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-10 15:02:57,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:57,865 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:02:57,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:02:57,866 INFO L85 PathProgramCache]: Analyzing trace with hash 468136080, now seen corresponding path program 2 times [2024-11-10 15:02:57,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:02:57,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492683834] [2024-11-10 15:02:57,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:02:57,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:02:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:02:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-10 15:02:58,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:02:58,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492683834] [2024-11-10 15:02:58,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492683834] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:02:58,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166670423] [2024-11-10 15:02:58,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 15:02:58,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:02:58,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:02:58,323 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:02:58,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-10 15:02:58,484 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 15:02:58,484 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:02:58,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-10 15:02:58,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:02:58,645 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 13 treesize of output 9 [2024-11-10 15:02:58,983 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-10 15:02:58,985 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 15:02:58,985 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 10 [2024-11-10 15:02:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-10 15:02:59,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:02:59,598 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 13 [2024-11-10 15:02:59,601 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 24 treesize of output 20 [2024-11-10 15:03:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-10 15:03:00,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166670423] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:03:00,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:03:00,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 18] total 47 [2024-11-10 15:03:00,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397273255] [2024-11-10 15:03:00,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:03:00,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-10 15:03:00,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:03:00,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-10 15:03:00,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2012, Unknown=0, NotChecked=0, Total=2162 [2024-11-10 15:03:00,018 INFO L87 Difference]: Start difference. First operand 382 states and 435 transitions. Second operand has 47 states, 47 states have (on average 3.3617021276595747) internal successors, (158), 47 states have internal predecessors, (158), 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) [2024-11-10 15:03:00,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-10 15:03:00,593 INFO L93 Difference]: Finished difference Result 665 states and 756 transitions. [2024-11-10 15:03:00,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-10 15:03:00,593 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.3617021276595747) internal successors, (158), 47 states have internal predecessors, (158), 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 69 [2024-11-10 15:03:00,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-10 15:03:00,595 INFO L225 Difference]: With dead ends: 665 [2024-11-10 15:03:00,595 INFO L226 Difference]: Without dead ends: 587 [2024-11-10 15:03:00,595 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=204, Invalid=2658, Unknown=0, NotChecked=0, Total=2862 [2024-11-10 15:03:00,596 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 116 mSDsluCounter, 1907 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-10 15:03:00,596 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 1989 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-10 15:03:00,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2024-11-10 15:03:00,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 578. [2024-11-10 15:03:00,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 574 states have (on average 1.1498257839721255) internal successors, (660), 577 states have internal predecessors, (660), 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) [2024-11-10 15:03:00,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 660 transitions. [2024-11-10 15:03:00,603 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 660 transitions. Word has length 69 [2024-11-10 15:03:00,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-10 15:03:00,603 INFO L471 AbstractCegarLoop]: Abstraction has 578 states and 660 transitions. [2024-11-10 15:03:00,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.3617021276595747) internal successors, (158), 47 states have internal predecessors, (158), 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) [2024-11-10 15:03:00,604 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 660 transitions. [2024-11-10 15:03:00,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-10 15:03:00,605 INFO L207 NwaCegarLoop]: Found error trace [2024-11-10 15:03:00,605 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 15:03:00,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-10 15:03:00,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:03:00,806 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-10 15:03:00,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 15:03:00,806 INFO L85 PathProgramCache]: Analyzing trace with hash 928030446, now seen corresponding path program 3 times [2024-11-10 15:03:00,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 15:03:00,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517768019] [2024-11-10 15:03:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 15:03:00,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 15:03:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 15:03:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-10 15:03:01,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 15:03:01,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517768019] [2024-11-10 15:03:01,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517768019] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 15:03:01,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470990955] [2024-11-10 15:03:01,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 15:03:01,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 15:03:01,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 15:03:01,142 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 15:03:01,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-10 15:03:01,293 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-10 15:03:01,293 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 15:03:01,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-10 15:03:01,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 15:03:01,401 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 14 treesize of output 10 [2024-11-10 15:03:03,012 INFO L349 Elim1Store]: treesize reduction 4, result has 87.9 percent of original size [2024-11-10 15:03:03,012 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 39 [2024-11-10 15:03:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 18 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-10 15:03:03,248 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 15:03:04,189 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 27 treesize of output 23 [2024-11-10 15:03:04,202 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 15:03:04,203 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 43 treesize of output 47 [2024-11-10 15:03:04,209 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 15 treesize of output 11 [2024-11-10 15:03:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-10 15:03:04,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470990955] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 15:03:04,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 15:03:04,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 43 [2024-11-10 15:03:04,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264910352] [2024-11-10 15:03:04,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 15:03:04,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-10 15:03:04,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 15:03:04,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-10 15:03:04,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1685, Unknown=0, NotChecked=0, Total=1892 [2024-11-10 15:03:04,392 INFO L87 Difference]: Start difference. First operand 578 states and 660 transitions. Second operand has 44 states, 43 states have (on average 3.744186046511628) internal successors, (161), 44 states have internal predecessors, (161), 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)