./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 18:01:47,081 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 18:01:47,158 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 18:01:47,177 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 18:01:47,177 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 18:01:47,198 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 18:01:47,199 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 18:01:47,199 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 18:01:47,199 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 18:01:47,199 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 18:01:47,200 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 18:01:47,200 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 18:01:47,202 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 18:01:47,203 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 18:01:47,205 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 18:01:47,205 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 18:01:47,205 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 18:01:47,206 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 18:01:47,206 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 18:01:47,206 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 18:01:47,206 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 18:01:47,206 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 18:01:47,207 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 18:01:47,207 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 18:01:47,207 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 18:01:47,207 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 18:01:47,207 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 18:01:47,207 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 18:01:47,207 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 18:01:47,208 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 18:01:47,208 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 18:01:47,208 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 18:01:47,208 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 18:01:47,208 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 18:01:47,208 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 18:01:47,209 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 18:01:47,209 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 18:01:47,209 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 18:01:47,209 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 18:01:47,209 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 18:01:47,209 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 18:01:47,210 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 18:01:47,210 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b [2024-10-11 18:01:47,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 18:01:47,442 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 18:01:47,447 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 18:01:47,448 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 18:01:47,448 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 18:01:47,449 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2024-10-11 18:01:48,732 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 18:01:48,900 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 18:01:48,901 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2024-10-11 18:01:48,907 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/4ccf7df95/30a1f2fcb1dc423682f6aff6f6019136/FLAG4804becab [2024-10-11 18:01:48,921 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/4ccf7df95/30a1f2fcb1dc423682f6aff6f6019136 [2024-10-11 18:01:48,923 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 18:01:48,925 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 18:01:48,925 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 18:01:48,926 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 18:01:48,930 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 18:01:48,931 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 06:01:48" (1/1) ... [2024-10-11 18:01:48,931 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21cb60e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:01:48, skipping insertion in model container [2024-10-11 18:01:48,932 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 06:01:48" (1/1) ... [2024-10-11 18:01:48,948 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 18:01:49,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 18:01:49,133 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 18:01:49,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 18:01:49,164 INFO L204 MainTranslator]: Completed translation [2024-10-11 18:01:49,164 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:01:49 WrapperNode [2024-10-11 18:01:49,164 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 18:01:49,165 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 18:01:49,166 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 18:01:49,166 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 18:01:49,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:01:49" (1/1) ... [2024-10-11 18:01:49,182 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:01:49" (1/1) ... [2024-10-11 18:01:49,200 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2024-10-11 18:01:49,200 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 18:01:49,201 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 18:01:49,201 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 18:01:49,201 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 18:01:49,209 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:01:49" (1/1) ... [2024-10-11 18:01:49,209 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:01:49" (1/1) ... [2024-10-11 18:01:49,211 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:01:49" (1/1) ... [2024-10-11 18:01:49,221 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [2, 1]. 67 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 1 writes are split as follows [1, 0]. [2024-10-11 18:01:49,222 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:01:49" (1/1) ... [2024-10-11 18:01:49,222 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:01:49" (1/1) ... [2024-10-11 18:01:49,226 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:01:49" (1/1) ... [2024-10-11 18:01:49,229 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:01:49" (1/1) ... [2024-10-11 18:01:49,230 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:01:49" (1/1) ... [2024-10-11 18:01:49,231 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:01:49" (1/1) ... [2024-10-11 18:01:49,232 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 18:01:49,233 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 18:01:49,233 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 18:01:49,233 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 18:01:49,234 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:01:49" (1/1) ... [2024-10-11 18:01:49,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 18:01:49,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:01:49,321 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 18:01:49,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 18:01:49,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 18:01:49,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 18:01:49,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 18:01:49,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 18:01:49,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 18:01:49,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 18:01:49,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 18:01:49,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 18:01:49,426 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 18:01:49,428 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 18:01:49,620 INFO L? ?]: Removed 27 outVars from TransFormulas that were not future-live. [2024-10-11 18:01:49,622 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 18:01:49,671 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 18:01:49,671 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 18:01:49,672 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 06:01:49 BoogieIcfgContainer [2024-10-11 18:01:49,672 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 18:01:49,674 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 18:01:49,674 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 18:01:49,677 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 18:01:49,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 06:01:48" (1/3) ... [2024-10-11 18:01:49,678 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd57e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 06:01:49, skipping insertion in model container [2024-10-11 18:01:49,678 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 06:01:49" (2/3) ... [2024-10-11 18:01:49,679 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd57e5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 06:01:49, skipping insertion in model container [2024-10-11 18:01:49,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 06:01:49" (3/3) ... [2024-10-11 18:01:49,680 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-read.c [2024-10-11 18:01:49,695 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 18:01:49,695 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2024-10-11 18:01:49,736 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 18:01:49,743 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;@17e9363a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 18:01:49,744 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-10-11 18:01:49,747 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-10-11 18:01:49,754 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:49,754 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-10-11 18:01:49,755 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:49,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:49,759 INFO L85 PathProgramCache]: Analyzing trace with hash 3108451, now seen corresponding path program 1 times [2024-10-11 18:01:49,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:49,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003203520] [2024-10-11 18:01:49,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:49,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:49,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:01:49,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:49,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003203520] [2024-10-11 18:01:49,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003203520] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:01:49,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:01:49,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 18:01:49,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041774824] [2024-10-11 18:01:49,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:01:49,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 18:01:49,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:49,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 18:01:49,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 18:01:49,988 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 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 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:50,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:50,046 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2024-10-11 18:01:50,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 18:01:50,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2024-10-11 18:01:50,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:50,053 INFO L225 Difference]: With dead ends: 27 [2024-10-11 18:01:50,054 INFO L226 Difference]: Without dead ends: 26 [2024-10-11 18:01:50,055 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 18:01:50,059 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:50,061 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 18:01:50,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-11 18:01:50,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2024-10-11 18:01:50,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.8) internal successors, (27), 22 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) [2024-10-11 18:01:50,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-10-11 18:01:50,086 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 4 [2024-10-11 18:01:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:50,087 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-10-11 18:01:50,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-10-11 18:01:50,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-11 18:01:50,087 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:50,088 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 18:01:50,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 18:01:50,088 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:50,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:50,089 INFO L85 PathProgramCache]: Analyzing trace with hash 96326476, now seen corresponding path program 1 times [2024-10-11 18:01:50,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:50,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613789569] [2024-10-11 18:01:50,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:50,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:01:50,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:50,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613789569] [2024-10-11 18:01:50,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613789569] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:01:50,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:01:50,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 18:01:50,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945303983] [2024-10-11 18:01:50,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:01:50,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 18:01:50,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:50,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 18:01:50,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 18:01:50,194 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:50,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:50,242 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-10-11 18:01:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 18:01:50,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2024-10-11 18:01:50,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:50,244 INFO L225 Difference]: With dead ends: 39 [2024-10-11 18:01:50,245 INFO L226 Difference]: Without dead ends: 39 [2024-10-11 18:01:50,245 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 18:01:50,246 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:50,248 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 18:01:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-10-11 18:01:50,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 25. [2024-10-11 18:01:50,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-10-11 18:01:50,252 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 5 [2024-10-11 18:01:50,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:50,252 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-10-11 18:01:50,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:50,253 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-10-11 18:01:50,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-11 18:01:50,253 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:50,253 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 18:01:50,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 18:01:50,254 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:50,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:50,255 INFO L85 PathProgramCache]: Analyzing trace with hash 96361891, now seen corresponding path program 1 times [2024-10-11 18:01:50,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:50,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76547574] [2024-10-11 18:01:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:50,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:01:50,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:50,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76547574] [2024-10-11 18:01:50,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76547574] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:01:50,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:01:50,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 18:01:50,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558189357] [2024-10-11 18:01:50,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:01:50,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 18:01:50,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:50,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 18:01:50,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 18:01:50,344 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:50,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:50,397 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2024-10-11 18:01:50,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 18:01:50,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2024-10-11 18:01:50,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:50,398 INFO L225 Difference]: With dead ends: 41 [2024-10-11 18:01:50,398 INFO L226 Difference]: Without dead ends: 41 [2024-10-11 18:01:50,398 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-11 18:01:50,399 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:50,400 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 28 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 18:01:50,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-11 18:01:50,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2024-10-11 18:01:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:50,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-10-11 18:01:50,408 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 5 [2024-10-11 18:01:50,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:50,409 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-10-11 18:01:50,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:50,409 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-10-11 18:01:50,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-11 18:01:50,409 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:50,409 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 18:01:50,409 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 18:01:50,409 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:50,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:50,410 INFO L85 PathProgramCache]: Analyzing trace with hash 96362034, now seen corresponding path program 1 times [2024-10-11 18:01:50,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:50,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674341821] [2024-10-11 18:01:50,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:50,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:01:50,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:50,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674341821] [2024-10-11 18:01:50,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674341821] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:01:50,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:01:50,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 18:01:50,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074055935] [2024-10-11 18:01:50,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:01:50,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 18:01:50,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:50,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 18:01:50,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 18:01:50,523 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:50,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:50,566 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2024-10-11 18:01:50,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 18:01:50,567 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2024-10-11 18:01:50,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:50,568 INFO L225 Difference]: With dead ends: 25 [2024-10-11 18:01:50,568 INFO L226 Difference]: Without dead ends: 25 [2024-10-11 18:01:50,568 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-11 18:01:50,569 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:50,569 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 17 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 18:01:50,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-10-11 18:01:50,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-10-11 18:01:50,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-10-11 18:01:50,576 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 5 [2024-10-11 18:01:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:50,577 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-10-11 18:01:50,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-10-11 18:01:50,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-11 18:01:50,578 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:50,578 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 18:01:50,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 18:01:50,579 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:50,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:50,579 INFO L85 PathProgramCache]: Analyzing trace with hash 96362035, now seen corresponding path program 1 times [2024-10-11 18:01:50,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:50,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705435886] [2024-10-11 18:01:50,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:50,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:01:50,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:50,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705435886] [2024-10-11 18:01:50,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705435886] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:01:50,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:01:50,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 18:01:50,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759427544] [2024-10-11 18:01:50,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:01:50,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 18:01:50,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:50,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 18:01:50,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 18:01:50,725 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:50,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:50,782 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-10-11 18:01:50,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 18:01:50,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2024-10-11 18:01:50,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:50,783 INFO L225 Difference]: With dead ends: 27 [2024-10-11 18:01:50,783 INFO L226 Difference]: Without dead ends: 27 [2024-10-11 18:01:50,783 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-11 18:01:50,784 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:50,785 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 18:01:50,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-10-11 18:01:50,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2024-10-11 18:01:50,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-10-11 18:01:50,787 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 5 [2024-10-11 18:01:50,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:50,787 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-10-11 18:01:50,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:50,787 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-10-11 18:01:50,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-10-11 18:01:50,788 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:50,788 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-11 18:01:50,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 18:01:50,788 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:50,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:50,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1885310484, now seen corresponding path program 1 times [2024-10-11 18:01:50,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:50,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002609459] [2024-10-11 18:01:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:50,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:01:50,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:50,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002609459] [2024-10-11 18:01:50,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002609459] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:01:50,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364312900] [2024-10-11 18:01:50,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:50,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:50,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:01:50,849 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:01:50,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 18:01:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:50,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 18:01:50,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:01:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:01:50,925 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:01:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:01:50,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364312900] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:01:50,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:01:50,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 18:01:50,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194461793] [2024-10-11 18:01:50,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:01:50,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 18:01:50,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:50,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 18:01:50,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-10-11 18:01:50,968 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:51,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:51,046 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2024-10-11 18:01:51,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 18:01:51,047 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-10-11 18:01:51,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:51,049 INFO L225 Difference]: With dead ends: 38 [2024-10-11 18:01:51,050 INFO L226 Difference]: Without dead ends: 38 [2024-10-11 18:01:51,051 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2024-10-11 18:01:51,052 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:51,052 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 46 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:01:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-10-11 18:01:51,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2024-10-11 18:01:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-10-11 18:01:51,062 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 7 [2024-10-11 18:01:51,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:51,062 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-10-11 18:01:51,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:51,063 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-10-11 18:01:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-11 18:01:51,063 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:51,063 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:01:51,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 18:01:51,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:51,264 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:51,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:51,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1684917050, now seen corresponding path program 1 times [2024-10-11 18:01:51,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:51,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416170282] [2024-10-11 18:01:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:51,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:01:51,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:51,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416170282] [2024-10-11 18:01:51,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416170282] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:01:51,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893306193] [2024-10-11 18:01:51,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:51,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:51,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:01:51,340 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:01:51,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 18:01:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:51,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 18:01:51,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:01:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:01:51,437 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:01:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:01:51,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893306193] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:01:51,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:01:51,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-10-11 18:01:51,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881455167] [2024-10-11 18:01:51,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:01:51,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 18:01:51,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:51,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 18:01:51,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-10-11 18:01:51,469 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2024-10-11 18:01:51,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:51,577 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2024-10-11 18:01:51,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 18:01:51,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 8 [2024-10-11 18:01:51,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:51,578 INFO L225 Difference]: With dead ends: 55 [2024-10-11 18:01:51,578 INFO L226 Difference]: Without dead ends: 55 [2024-10-11 18:01:51,578 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2024-10-11 18:01:51,579 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:51,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 18 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:01:51,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-10-11 18:01:51,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2024-10-11 18:01:51,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 32 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) [2024-10-11 18:01:51,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2024-10-11 18:01:51,584 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 8 [2024-10-11 18:01:51,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:51,584 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2024-10-11 18:01:51,584 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2024-10-11 18:01:51,584 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2024-10-11 18:01:51,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-11 18:01:51,585 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:51,585 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2024-10-11 18:01:51,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 18:01:51,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:51,786 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:51,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:51,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1684917194, now seen corresponding path program 1 times [2024-10-11 18:01:51,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:51,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855476641] [2024-10-11 18:01:51,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:51,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:51,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:01:51,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:51,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855476641] [2024-10-11 18:01:51,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855476641] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:01:51,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22499380] [2024-10-11 18:01:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:51,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:51,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:01:51,879 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:01:51,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 18:01:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:51,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 18:01:51,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:01:51,981 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 1 [2024-10-11 18:01:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:01:52,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:01:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:01:52,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22499380] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:01:52,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:01:52,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-11 18:01:52,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757657201] [2024-10-11 18:01:52,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:01:52,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 18:01:52,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:52,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 18:01:52,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-10-11 18:01:52,122 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:52,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:52,237 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2024-10-11 18:01:52,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 18:01:52,238 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-11 18:01:52,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:52,238 INFO L225 Difference]: With dead ends: 36 [2024-10-11 18:01:52,238 INFO L226 Difference]: Without dead ends: 36 [2024-10-11 18:01:52,239 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2024-10-11 18:01:52,239 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 73 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:52,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 30 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:01:52,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-10-11 18:01:52,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2024-10-11 18:01:52,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:52,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2024-10-11 18:01:52,246 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 8 [2024-10-11 18:01:52,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:52,246 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2024-10-11 18:01:52,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:52,246 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2024-10-11 18:01:52,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-11 18:01:52,247 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:52,247 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2024-10-11 18:01:52,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 18:01:52,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:52,448 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:52,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:52,448 INFO L85 PathProgramCache]: Analyzing trace with hash 87024195, now seen corresponding path program 2 times [2024-10-11 18:01:52,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:52,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480706971] [2024-10-11 18:01:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:52,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 18:01:52,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:52,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480706971] [2024-10-11 18:01:52,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480706971] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:01:52,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:01:52,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 18:01:52,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398424937] [2024-10-11 18:01:52,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:01:52,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 18:01:52,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:52,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 18:01:52,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-11 18:01:52,518 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:52,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:52,536 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2024-10-11 18:01:52,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 18:01:52,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-10-11 18:01:52,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:52,537 INFO L225 Difference]: With dead ends: 32 [2024-10-11 18:01:52,537 INFO L226 Difference]: Without dead ends: 32 [2024-10-11 18:01:52,538 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-11 18:01:52,538 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:52,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 11 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 18:01:52,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-11 18:01:52,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-10-11 18:01:52,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 31 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:52,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2024-10-11 18:01:52,540 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 11 [2024-10-11 18:01:52,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:52,541 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2024-10-11 18:01:52,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:52,541 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2024-10-11 18:01:52,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-11 18:01:52,541 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:52,541 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2024-10-11 18:01:52,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 18:01:52,542 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:52,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:52,542 INFO L85 PathProgramCache]: Analyzing trace with hash 87024196, now seen corresponding path program 1 times [2024-10-11 18:01:52,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:52,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861804660] [2024-10-11 18:01:52,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:52,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 18:01:52,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:52,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861804660] [2024-10-11 18:01:52,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861804660] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:01:52,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 18:01:52,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 18:01:52,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026777110] [2024-10-11 18:01:52,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:01:52,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 18:01:52,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:52,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 18:01:52,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 18:01:52,615 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2024-10-11 18:01:52,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:52,648 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2024-10-11 18:01:52,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 18:01:52,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 11 [2024-10-11 18:01:52,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:52,649 INFO L225 Difference]: With dead ends: 51 [2024-10-11 18:01:52,649 INFO L226 Difference]: Without dead ends: 51 [2024-10-11 18:01:52,649 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 18:01:52,649 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:52,650 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 18:01:52,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-10-11 18:01:52,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2024-10-11 18:01:52,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2024-10-11 18:01:52,655 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 11 [2024-10-11 18:01:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:52,656 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2024-10-11 18:01:52,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2024-10-11 18:01:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2024-10-11 18:01:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-10-11 18:01:52,656 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:52,656 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:01:52,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 18:01:52,656 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:52,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:52,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1284463060, now seen corresponding path program 1 times [2024-10-11 18:01:52,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:52,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054358284] [2024-10-11 18:01:52,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:52,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:52,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:52,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 18:01:52,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:52,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054358284] [2024-10-11 18:01:52,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054358284] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:01:52,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775542796] [2024-10-11 18:01:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:52,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:52,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:01:52,720 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:01:52,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 18:01:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:52,765 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 18:01:52,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:01:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 18:01:52,844 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:01:52,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-11 18:01:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 18:01:52,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775542796] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:01:52,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:01:52,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-10-11 18:01:52,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254213372] [2024-10-11 18:01:52,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:01:52,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 18:01:52,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:52,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 18:01:52,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-10-11 18:01:52,919 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:52,991 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-10-11 18:01:52,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 18:01:52,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-10-11 18:01:52,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:52,992 INFO L225 Difference]: With dead ends: 53 [2024-10-11 18:01:52,992 INFO L226 Difference]: Without dead ends: 53 [2024-10-11 18:01:52,992 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-10-11 18:01:52,993 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:52,993 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 22 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 18:01:52,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-10-11 18:01:52,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2024-10-11 18:01:52,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 49 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) [2024-10-11 18:01:52,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-10-11 18:01:52,997 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 15 [2024-10-11 18:01:52,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:52,997 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-10-11 18:01:52,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:52,997 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-10-11 18:01:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-10-11 18:01:52,998 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:52,998 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1] [2024-10-11 18:01:53,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 18:01:53,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 18:01:53,199 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:53,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:53,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1343436067, now seen corresponding path program 2 times [2024-10-11 18:01:53,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:53,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588213819] [2024-10-11 18:01:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:53,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:01:53,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:53,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588213819] [2024-10-11 18:01:53,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588213819] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:01:53,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258755419] [2024-10-11 18:01:53,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 18:01:53,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:53,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:01:53,314 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:01:53,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 18:01:53,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 18:01:53,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:01:53,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 18:01:53,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:01:53,409 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 18:01:53,409 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 18:01:53,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258755419] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:01:53,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 18:01:53,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2024-10-11 18:01:53,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669033891] [2024-10-11 18:01:53,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:01:53,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 18:01:53,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:53,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 18:01:53,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-10-11 18:01:53,411 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:53,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:53,466 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2024-10-11 18:01:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 18:01:53,467 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 16 [2024-10-11 18:01:53,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:53,467 INFO L225 Difference]: With dead ends: 43 [2024-10-11 18:01:53,467 INFO L226 Difference]: Without dead ends: 43 [2024-10-11 18:01:53,468 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-10-11 18:01:53,468 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:53,468 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 30 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 18:01:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-10-11 18:01:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-10-11 18:01:53,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:53,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-10-11 18:01:53,470 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 16 [2024-10-11 18:01:53,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:53,471 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-10-11 18:01:53,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:53,471 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-10-11 18:01:53,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-11 18:01:53,471 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:53,471 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:01:53,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-11 18:01:53,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-11 18:01:53,672 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:53,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:53,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1713387055, now seen corresponding path program 1 times [2024-10-11 18:01:53,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:53,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114868723] [2024-10-11 18:01:53,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:53,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:53,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 18:01:53,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:53,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114868723] [2024-10-11 18:01:53,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114868723] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:01:53,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686909415] [2024-10-11 18:01:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:53,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:53,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:01:53,718 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:01:53,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 18:01:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:53,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 18:01:53,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:01:53,901 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_17| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_26| Int)) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_26| 1) |v_ULTIMATE.start_main_~#mask~0#1.base_17|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_26|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_26| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_17| 0)))) is different from true [2024-10-11 18:01:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 18:01:53,904 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 18:01:53,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686909415] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:01:53,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 18:01:53,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2024-10-11 18:01:53,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677679806] [2024-10-11 18:01:53,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:01:53,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 18:01:53,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:53,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 18:01:53,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2024-10-11 18:01:53,905 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2024-10-11 18:01:53,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:53,926 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2024-10-11 18:01:53,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 18:01:53,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 17 [2024-10-11 18:01:53,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:53,927 INFO L225 Difference]: With dead ends: 43 [2024-10-11 18:01:53,927 INFO L226 Difference]: Without dead ends: 42 [2024-10-11 18:01:53,927 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2024-10-11 18:01:53,927 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:53,928 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2024-10-11 18:01:53,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-11 18:01:53,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-10-11 18:01:53,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:53,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2024-10-11 18:01:53,930 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 17 [2024-10-11 18:01:53,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:53,930 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2024-10-11 18:01:53,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2024-10-11 18:01:53,930 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2024-10-11 18:01:53,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-11 18:01:53,930 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:53,931 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 18:01:53,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 18:01:54,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-11 18:01:54,132 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:54,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:54,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1575394492, now seen corresponding path program 1 times [2024-10-11 18:01:54,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:54,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106202437] [2024-10-11 18:01:54,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:54,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 18:01:54,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:54,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106202437] [2024-10-11 18:01:54,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106202437] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:01:54,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284123185] [2024-10-11 18:01:54,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:54,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:54,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:01:54,195 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:01:54,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 18:01:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:54,243 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 18:01:54,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:01:54,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 18:01:54,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-11 18:01:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:01:54,404 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:01:54,470 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 14 treesize of output 12 [2024-10-11 18:01:54,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-10-11 18:01:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 18:01:54,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284123185] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:01:54,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:01:54,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 9, 9] total 18 [2024-10-11 18:01:54,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554507306] [2024-10-11 18:01:54,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:01:54,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 18:01:54,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:54,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 18:01:54,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2024-10-11 18:01:54,573 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2024-10-11 18:01:54,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:54,691 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2024-10-11 18:01:54,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 18:01:54,691 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 18 [2024-10-11 18:01:54,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:54,692 INFO L225 Difference]: With dead ends: 66 [2024-10-11 18:01:54,692 INFO L226 Difference]: Without dead ends: 66 [2024-10-11 18:01:54,692 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2024-10-11 18:01:54,692 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:54,692 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 47 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:01:54,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-11 18:01:54,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 45. [2024-10-11 18:01:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.225) internal successors, (49), 44 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) [2024-10-11 18:01:54,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2024-10-11 18:01:54,698 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 18 [2024-10-11 18:01:54,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:54,699 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2024-10-11 18:01:54,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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) [2024-10-11 18:01:54,699 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2024-10-11 18:01:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-10-11 18:01:54,700 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:54,701 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1] [2024-10-11 18:01:54,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 18:01:54,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:54,902 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:54,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:54,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1817303157, now seen corresponding path program 1 times [2024-10-11 18:01:54,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:54,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16672371] [2024-10-11 18:01:54,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:54,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 18:01:54,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:54,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16672371] [2024-10-11 18:01:54,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16672371] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:01:54,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880639226] [2024-10-11 18:01:54,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:54,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:54,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:01:54,978 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:01:54,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 18:01:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:55,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 18:01:55,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:01:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 18:01:55,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:01:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 18:01:55,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880639226] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:01:55,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:01:55,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-10-11 18:01:55,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500597598] [2024-10-11 18:01:55,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:01:55,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 18:01:55,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:55,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 18:01:55,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-10-11 18:01:55,143 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:55,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:55,261 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2024-10-11 18:01:55,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 18:01:55,261 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 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 [2024-10-11 18:01:55,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:55,262 INFO L225 Difference]: With dead ends: 45 [2024-10-11 18:01:55,262 INFO L226 Difference]: Without dead ends: 45 [2024-10-11 18:01:55,262 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2024-10-11 18:01:55,263 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:55,263 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 20 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:01:55,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-10-11 18:01:55,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-10-11 18:01:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.2) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:55,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2024-10-11 18:01:55,265 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 21 [2024-10-11 18:01:55,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:55,265 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2024-10-11 18:01:55,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:55,265 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2024-10-11 18:01:55,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-11 18:01:55,269 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:55,269 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 1, 1, 1] [2024-10-11 18:01:55,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 18:01:55,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-11 18:01:55,470 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:55,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:55,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1209637900, now seen corresponding path program 2 times [2024-10-11 18:01:55,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:55,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022697747] [2024-10-11 18:01:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:55,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 18:01:55,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:55,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022697747] [2024-10-11 18:01:55,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022697747] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:01:55,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990510284] [2024-10-11 18:01:55,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 18:01:55,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:55,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:01:55,608 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:01:55,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 18:01:55,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 18:01:55,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:01:55,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 18:01:55,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:01:55,668 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 [2024-10-11 18:01:55,681 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 1 [2024-10-11 18:01:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 18:01:55,793 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:01:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 18:01:55,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990510284] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:01:55,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:01:55,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 8 [2024-10-11 18:01:55,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129973390] [2024-10-11 18:01:55,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:01:55,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 18:01:55,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:55,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 18:01:55,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-10-11 18:01:55,887 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 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) [2024-10-11 18:01:55,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:55,957 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2024-10-11 18:01:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 18:01:55,958 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 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 24 [2024-10-11 18:01:55,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:55,958 INFO L225 Difference]: With dead ends: 104 [2024-10-11 18:01:55,958 INFO L226 Difference]: Without dead ends: 104 [2024-10-11 18:01:55,958 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-10-11 18:01:55,959 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:55,959 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 45 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 18:01:55,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-10-11 18:01:55,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2024-10-11 18:01:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.2365591397849462) internal successors, (115), 97 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) [2024-10-11 18:01:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 115 transitions. [2024-10-11 18:01:55,965 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 115 transitions. Word has length 24 [2024-10-11 18:01:55,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:55,966 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 115 transitions. [2024-10-11 18:01:55,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 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) [2024-10-11 18:01:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 115 transitions. [2024-10-11 18:01:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-10-11 18:01:55,968 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:55,968 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1] [2024-10-11 18:01:55,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 18:01:56,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:56,172 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:56,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:56,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1474307132, now seen corresponding path program 1 times [2024-10-11 18:01:56,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:56,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143191749] [2024-10-11 18:01:56,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:56,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-11 18:01:56,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:56,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143191749] [2024-10-11 18:01:56,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143191749] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:01:56,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514988181] [2024-10-11 18:01:56,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:56,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:56,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:01:56,279 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:01:56,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 18:01:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:56,331 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 18:01:56,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:01:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 18:01:56,417 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:01:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 18:01:56,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514988181] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:01:56,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:01:56,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-10-11 18:01:56,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874326410] [2024-10-11 18:01:56,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:01:56,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 18:01:56,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:56,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 18:01:56,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-10-11 18:01:56,478 INFO L87 Difference]: Start difference. First operand 98 states and 115 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:56,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:56,592 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2024-10-11 18:01:56,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 18:01:56,592 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-10-11 18:01:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:56,593 INFO L225 Difference]: With dead ends: 95 [2024-10-11 18:01:56,593 INFO L226 Difference]: Without dead ends: 95 [2024-10-11 18:01:56,593 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=332, Unknown=0, NotChecked=0, Total=462 [2024-10-11 18:01:56,594 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:56,594 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 33 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:01:56,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-10-11 18:01:56,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2024-10-11 18:01:56,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 92 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) [2024-10-11 18:01:56,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2024-10-11 18:01:56,597 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 26 [2024-10-11 18:01:56,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:56,597 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2024-10-11 18:01:56,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:56,597 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2024-10-11 18:01:56,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-10-11 18:01:56,598 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:56,598 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-11 18:01:56,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-11 18:01:56,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 18:01:56,802 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:56,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:56,802 INFO L85 PathProgramCache]: Analyzing trace with hash 886822156, now seen corresponding path program 2 times [2024-10-11 18:01:56,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:56,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316523837] [2024-10-11 18:01:56,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:56,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:56,879 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-10-11 18:01:56,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:56,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316523837] [2024-10-11 18:01:56,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316523837] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:01:56,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712816679] [2024-10-11 18:01:56,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 18:01:56,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:56,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:01:56,881 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:01:56,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 18:01:56,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 18:01:56,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:01:56,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 18:01:56,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:01:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 18:01:57,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:01:57,106 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 [2024-10-11 18:01:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 18:01:57,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712816679] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:01:57,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:01:57,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2024-10-11 18:01:57,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912658398] [2024-10-11 18:01:57,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:01:57,180 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 18:01:57,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:57,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 18:01:57,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-10-11 18:01:57,181 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 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) [2024-10-11 18:01:57,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:57,306 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2024-10-11 18:01:57,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 18:01:57,306 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 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 31 [2024-10-11 18:01:57,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:57,307 INFO L225 Difference]: With dead ends: 100 [2024-10-11 18:01:57,307 INFO L226 Difference]: Without dead ends: 100 [2024-10-11 18:01:57,307 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2024-10-11 18:01:57,307 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 114 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:57,308 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 48 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:01:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-10-11 18:01:57,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2024-10-11 18:01:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.1868131868131868) internal successors, (108), 95 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) [2024-10-11 18:01:57,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2024-10-11 18:01:57,316 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 31 [2024-10-11 18:01:57,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:57,316 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2024-10-11 18:01:57,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 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) [2024-10-11 18:01:57,317 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2024-10-11 18:01:57,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-11 18:01:57,317 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:57,317 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 2, 2, 2, 1, 1] [2024-10-11 18:01:57,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 18:01:57,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 18:01:57,518 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:57,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:57,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1216344948, now seen corresponding path program 2 times [2024-10-11 18:01:57,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:57,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955342235] [2024-10-11 18:01:57,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:57,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 21 proven. 114 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 18:01:57,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:57,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955342235] [2024-10-11 18:01:57,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955342235] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:01:57,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209663745] [2024-10-11 18:01:57,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 18:01:57,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:57,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:01:57,650 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:01:57,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 18:01:57,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 18:01:57,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:01:57,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 18:01:57,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:01:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 31 proven. 104 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 18:01:57,833 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:01:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 31 proven. 104 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-11 18:01:57,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209663745] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:01:57,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:01:57,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-10-11 18:01:57,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101537325] [2024-10-11 18:01:57,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:01:57,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 18:01:57,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:57,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 18:01:57,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2024-10-11 18:01:57,904 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:58,072 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2024-10-11 18:01:58,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 18:01:58,072 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-10-11 18:01:58,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:58,073 INFO L225 Difference]: With dead ends: 96 [2024-10-11 18:01:58,073 INFO L226 Difference]: Without dead ends: 96 [2024-10-11 18:01:58,073 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2024-10-11 18:01:58,074 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:58,074 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 31 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:01:58,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-10-11 18:01:58,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2024-10-11 18:01:58,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 93 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) [2024-10-11 18:01:58,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2024-10-11 18:01:58,076 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 39 [2024-10-11 18:01:58,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:58,076 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2024-10-11 18:01:58,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:58,076 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2024-10-11 18:01:58,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-11 18:01:58,077 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:58,077 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2024-10-11 18:01:58,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-10-11 18:01:58,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:58,281 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:58,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:58,282 INFO L85 PathProgramCache]: Analyzing trace with hash -457683244, now seen corresponding path program 3 times [2024-10-11 18:01:58,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:58,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035351548] [2024-10-11 18:01:58,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:58,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 98 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-10-11 18:01:58,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:58,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035351548] [2024-10-11 18:01:58,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035351548] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:01:58,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022583766] [2024-10-11 18:01:58,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 18:01:58,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:58,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:01:58,396 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:01:58,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 18:01:58,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 18:01:58,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:01:58,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-11 18:01:58,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:01:58,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 18:01:58,471 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 11 treesize of output 5 [2024-10-11 18:01:58,475 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 [2024-10-11 18:01:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2024-10-11 18:01:58,630 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 18:01:58,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022583766] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:01:58,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 18:01:58,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2024-10-11 18:01:58,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217026877] [2024-10-11 18:01:58,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:01:58,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 18:01:58,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:58,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 18:01:58,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-10-11 18:01:58,631 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:58,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:58,667 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2024-10-11 18:01:58,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 18:01:58,667 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-10-11 18:01:58,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:58,668 INFO L225 Difference]: With dead ends: 92 [2024-10-11 18:01:58,668 INFO L226 Difference]: Without dead ends: 92 [2024-10-11 18:01:58,668 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-10-11 18:01:58,669 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:58,669 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-11 18:01:58,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-10-11 18:01:58,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2024-10-11 18:01:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2024-10-11 18:01:58,676 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 47 [2024-10-11 18:01:58,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:58,676 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2024-10-11 18:01:58,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2024-10-11 18:01:58,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-10-11 18:01:58,676 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:58,677 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2024-10-11 18:01:58,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-11 18:01:58,877 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:58,877 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:58,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:58,878 INFO L85 PathProgramCache]: Analyzing trace with hash 529754649, now seen corresponding path program 1 times [2024-10-11 18:01:58,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:58,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563992259] [2024-10-11 18:01:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:58,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 88 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-11 18:01:59,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:59,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563992259] [2024-10-11 18:01:59,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563992259] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:01:59,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484334980] [2024-10-11 18:01:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:59,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:59,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:01:59,010 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:01:59,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 18:01:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:59,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 18:01:59,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:01:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 36 proven. 70 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-11 18:01:59,180 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:01:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 36 proven. 70 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-10-11 18:01:59,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484334980] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:01:59,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:01:59,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-10-11 18:01:59,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917038252] [2024-10-11 18:01:59,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:01:59,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 18:01:59,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:01:59,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 18:01:59,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2024-10-11 18:01:59,265 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:59,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:01:59,462 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2024-10-11 18:01:59,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-11 18:01:59,463 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 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 [2024-10-11 18:01:59,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:01:59,463 INFO L225 Difference]: With dead ends: 72 [2024-10-11 18:01:59,463 INFO L226 Difference]: Without dead ends: 72 [2024-10-11 18:01:59,463 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2024-10-11 18:01:59,464 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:01:59,464 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 35 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:01:59,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-11 18:01:59,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-10-11 18:01:59,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:59,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2024-10-11 18:01:59,466 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 51 [2024-10-11 18:01:59,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:01:59,466 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2024-10-11 18:01:59,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:01:59,466 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2024-10-11 18:01:59,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-10-11 18:01:59,467 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:01:59,467 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2024-10-11 18:01:59,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-11 18:01:59,667 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-11 18:01:59,667 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:01:59,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:01:59,668 INFO L85 PathProgramCache]: Analyzing trace with hash -798823888, now seen corresponding path program 2 times [2024-10-11 18:01:59,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:01:59,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073560407] [2024-10-11 18:01:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:01:59,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:01:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:01:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-10-11 18:01:59,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:01:59,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073560407] [2024-10-11 18:01:59,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073560407] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:01:59,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515264329] [2024-10-11 18:01:59,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 18:01:59,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:01:59,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:01:59,753 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:01:59,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 18:01:59,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 18:01:59,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:01:59,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 18:01:59,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:02:00,083 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_18| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_27| Int) (v_DerPreprocessor_3 Int) (v_DerPreprocessor_2 Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#mask~0#1.base_18|) 0) (= v_DerPreprocessor_2 (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_27| v_DerPreprocessor_2) |v_ULTIMATE.start_main_~#mask~0#1.base_18| v_DerPreprocessor_3) |v_ULTIMATE.start_main_~#b~0#1.base_27|)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_27|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_27| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_18| 0)))) is different from true [2024-10-11 18:02:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-10-11 18:02:00,084 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 18:02:00,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515264329] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 18:02:00,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 18:02:00,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2024-10-11 18:02:00,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687447286] [2024-10-11 18:02:00,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 18:02:00,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 18:02:00,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:02:00,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 18:02:00,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=39, Unknown=1, NotChecked=12, Total=72 [2024-10-11 18:02:00,085 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:00,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:02:00,100 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2024-10-11 18:02:00,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 18:02:00,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-10-11 18:02:00,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:02:00,101 INFO L225 Difference]: With dead ends: 71 [2024-10-11 18:02:00,101 INFO L226 Difference]: Without dead ends: 58 [2024-10-11 18:02:00,101 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=39, Unknown=1, NotChecked=12, Total=72 [2024-10-11 18:02:00,102 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-11 18:02:00,102 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2024-10-11 18:02:00,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-10-11 18:02:00,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-10-11 18:02:00,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2024-10-11 18:02:00,103 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 54 [2024-10-11 18:02:00,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:02:00,103 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2024-10-11 18:02:00,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:00,103 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2024-10-11 18:02:00,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-11 18:02:00,104 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:02:00,104 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 3, 3, 3, 1, 1] [2024-10-11 18:02:00,120 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-11 18:02:00,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:00,307 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:02:00,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:02:00,307 INFO L85 PathProgramCache]: Analyzing trace with hash -278353659, now seen corresponding path program 3 times [2024-10-11 18:02:00,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:02:00,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091321260] [2024-10-11 18:02:00,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:02:00,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:02:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:02:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 141 proven. 26 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2024-10-11 18:02:00,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:02:00,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091321260] [2024-10-11 18:02:00,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091321260] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:02:00,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663109252] [2024-10-11 18:02:00,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 18:02:00,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:00,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:02:00,420 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:02:00,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 18:02:00,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 18:02:00,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:02:00,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 18:02:00,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:02:00,490 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 1 [2024-10-11 18:02:00,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-11 18:02:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-10-11 18:02:00,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:02:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 149 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2024-10-11 18:02:00,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663109252] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:02:00,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:02:00,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 12 [2024-10-11 18:02:00,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340630049] [2024-10-11 18:02:00,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:02:00,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 18:02:00,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:02:00,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 18:02:00,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-10-11 18:02:00,917 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:01,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:02:01,023 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2024-10-11 18:02:01,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 18:02:01,024 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-10-11 18:02:01,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:02:01,024 INFO L225 Difference]: With dead ends: 61 [2024-10-11 18:02:01,024 INFO L226 Difference]: Without dead ends: 61 [2024-10-11 18:02:01,024 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2024-10-11 18:02:01,025 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:02:01,025 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:02:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-11 18:02:01,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2024-10-11 18:02:01,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:01,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-10-11 18:02:01,026 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2024-10-11 18:02:01,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:02:01,026 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-10-11 18:02:01,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:01,026 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-10-11 18:02:01,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-11 18:02:01,026 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:02:01,026 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 3, 3, 3, 1, 1] [2024-10-11 18:02:01,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-11 18:02:01,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-11 18:02:01,227 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:02:01,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:02:01,228 INFO L85 PathProgramCache]: Analyzing trace with hash -39028783, now seen corresponding path program 1 times [2024-10-11 18:02:01,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:02:01,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792741500] [2024-10-11 18:02:01,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:02:01,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:02:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:02:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 68 proven. 184 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-10-11 18:02:01,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:02:01,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792741500] [2024-10-11 18:02:01,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792741500] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:02:01,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501229507] [2024-10-11 18:02:01,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:02:01,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:01,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:02:01,480 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:02:01,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-11 18:02:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:02:01,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-11 18:02:01,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:02:01,574 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 1 [2024-10-11 18:02:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2024-10-11 18:02:01,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:02:02,027 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2024-10-11 18:02:02,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501229507] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:02:02,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:02:02,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2024-10-11 18:02:02,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200970034] [2024-10-11 18:02:02,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:02:02,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 18:02:02,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:02:02,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 18:02:02,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-10-11 18:02:02,029 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 21 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:02,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:02:02,344 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2024-10-11 18:02:02,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 18:02:02,345 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 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 [2024-10-11 18:02:02,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:02:02,346 INFO L225 Difference]: With dead ends: 81 [2024-10-11 18:02:02,346 INFO L226 Difference]: Without dead ends: 81 [2024-10-11 18:02:02,347 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 18:02:02,347 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:02:02,347 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:02:02,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-10-11 18:02:02,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2024-10-11 18:02:02,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 74 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2024-10-11 18:02:02,349 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 56 [2024-10-11 18:02:02,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:02:02,350 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2024-10-11 18:02:02,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.85) internal successors, (77), 20 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:02,350 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2024-10-11 18:02:02,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-10-11 18:02:02,351 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:02:02,351 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 19, 4, 3, 3, 3, 1, 1] [2024-10-11 18:02:02,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-11 18:02:02,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:02,555 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:02:02,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:02:02,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1554330161, now seen corresponding path program 2 times [2024-10-11 18:02:02,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:02:02,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215466798] [2024-10-11 18:02:02,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:02:02,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:02:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:02:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 155 proven. 451 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-10-11 18:02:02,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:02:02,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215466798] [2024-10-11 18:02:02,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215466798] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:02:02,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232217165] [2024-10-11 18:02:02,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 18:02:02,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:02,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:02:02,861 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:02:02,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-11 18:02:02,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 18:02:02,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:02:02,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 18:02:02,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:02:03,129 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 293 proven. 273 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-10-11 18:02:03,129 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:02:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 293 proven. 273 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-10-11 18:02:03,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232217165] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:02:03,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:02:03,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 24 [2024-10-11 18:02:03,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685096436] [2024-10-11 18:02:03,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:02:03,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-11 18:02:03,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:02:03,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-11 18:02:03,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2024-10-11 18:02:03,245 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 25 states, 25 states have (on average 3.52) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:03,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:02:03,499 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2024-10-11 18:02:03,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-11 18:02:03,499 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.52) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 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 74 [2024-10-11 18:02:03,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:02:03,500 INFO L225 Difference]: With dead ends: 96 [2024-10-11 18:02:03,500 INFO L226 Difference]: Without dead ends: 96 [2024-10-11 18:02:03,503 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 130 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=416, Invalid=1390, Unknown=0, NotChecked=0, Total=1806 [2024-10-11 18:02:03,504 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-11 18:02:03,504 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 9 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-11 18:02:03,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-10-11 18:02:03,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2024-10-11 18:02:03,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.096774193548387) internal successors, (102), 93 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:03,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2024-10-11 18:02:03,507 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 74 [2024-10-11 18:02:03,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:02:03,508 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2024-10-11 18:02:03,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.52) internal successors, (88), 24 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:03,508 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2024-10-11 18:02:03,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-10-11 18:02:03,509 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:02:03,509 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 23, 5, 4, 4, 4, 1, 1] [2024-10-11 18:02:03,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-11 18:02:03,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-11 18:02:03,710 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:02:03,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:02:03,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1408809752, now seen corresponding path program 3 times [2024-10-11 18:02:03,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:02:03,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083537823] [2024-10-11 18:02:03,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:02:03,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:02:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:02:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 555 proven. 193 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-10-11 18:02:03,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:02:03,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083537823] [2024-10-11 18:02:03,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083537823] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:02:03,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988782239] [2024-10-11 18:02:03,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 18:02:03,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:03,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:02:03,985 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:02:03,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-11 18:02:04,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-10-11 18:02:04,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:02:04,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 18:02:04,109 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:02:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 210 proven. 547 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-10-11 18:02:04,425 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:02:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 68 proven. 689 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2024-10-11 18:02:04,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988782239] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:02:04,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:02:04,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 37 [2024-10-11 18:02:04,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867664489] [2024-10-11 18:02:04,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:02:04,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-11 18:02:04,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:02:04,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-11 18:02:04,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2024-10-11 18:02:04,730 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 38 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:05,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:02:05,410 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2024-10-11 18:02:05,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-11 18:02:05,411 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 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 90 [2024-10-11 18:02:05,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:02:05,411 INFO L225 Difference]: With dead ends: 96 [2024-10-11 18:02:05,412 INFO L226 Difference]: Without dead ends: 96 [2024-10-11 18:02:05,413 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=831, Invalid=3725, Unknown=0, NotChecked=0, Total=4556 [2024-10-11 18:02:05,413 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 18:02:05,413 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 2 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 18:02:05,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-10-11 18:02:05,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2024-10-11 18:02:05,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.075268817204301) internal successors, (100), 93 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) [2024-10-11 18:02:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2024-10-11 18:02:05,415 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 90 [2024-10-11 18:02:05,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:02:05,415 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2024-10-11 18:02:05,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.1315789473684212) internal successors, (119), 37 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:05,416 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2024-10-11 18:02:05,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-10-11 18:02:05,416 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:02:05,416 INFO L215 NwaCegarLoop]: trace histogram [25, 25, 24, 5, 4, 4, 4, 1, 1] [2024-10-11 18:02:05,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-11 18:02:05,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:05,621 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:02:05,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:02:05,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1083310579, now seen corresponding path program 4 times [2024-10-11 18:02:05,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:02:05,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105901609] [2024-10-11 18:02:05,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:02:05,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:02:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:02:05,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 165 proven. 789 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-10-11 18:02:05,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:02:05,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105901609] [2024-10-11 18:02:05,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105901609] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:02:05,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106542562] [2024-10-11 18:02:05,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 18:02:05,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:05,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:02:05,943 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:02:05,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-11 18:02:06,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 18:02:06,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:02:06,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 18:02:06,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:02:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 193 proven. 761 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-10-11 18:02:06,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:02:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 193 proven. 761 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-10-11 18:02:06,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106542562] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:02:06,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:02:06,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 38 [2024-10-11 18:02:06,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829876244] [2024-10-11 18:02:06,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:02:06,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-11 18:02:06,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:02:06,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-11 18:02:06,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1086, Unknown=0, NotChecked=0, Total=1482 [2024-10-11 18:02:06,603 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 39 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 38 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:07,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:02:07,478 INFO L93 Difference]: Finished difference Result 236 states and 257 transitions. [2024-10-11 18:02:07,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-10-11 18:02:07,482 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 38 states have internal predecessors, (149), 0 states have call successors, (0), 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 93 [2024-10-11 18:02:07,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:02:07,483 INFO L225 Difference]: With dead ends: 236 [2024-10-11 18:02:07,483 INFO L226 Difference]: Without dead ends: 236 [2024-10-11 18:02:07,486 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 157 SyntacticMatches, 7 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4158 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2681, Invalid=7621, Unknown=0, NotChecked=0, Total=10302 [2024-10-11 18:02:07,486 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-11 18:02:07,487 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 7 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-11 18:02:07,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-10-11 18:02:07,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2024-10-11 18:02:07,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.094420600858369) internal successors, (255), 233 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:07,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 255 transitions. [2024-10-11 18:02:07,490 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 255 transitions. Word has length 93 [2024-10-11 18:02:07,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:02:07,491 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 255 transitions. [2024-10-11 18:02:07,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.8205128205128207) internal successors, (149), 38 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 255 transitions. [2024-10-11 18:02:07,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2024-10-11 18:02:07,492 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:02:07,492 INFO L215 NwaCegarLoop]: trace histogram [50, 50, 49, 10, 9, 9, 9, 1, 1] [2024-10-11 18:02:07,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-11 18:02:07,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-11 18:02:07,697 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:02:07,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:02:07,697 INFO L85 PathProgramCache]: Analyzing trace with hash 652525681, now seen corresponding path program 5 times [2024-10-11 18:02:07,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:02:07,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401088455] [2024-10-11 18:02:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:02:07,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:02:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:02:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 2463 proven. 138 refuted. 0 times theorem prover too weak. 1677 trivial. 0 not checked. [2024-10-11 18:02:08,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:02:08,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401088455] [2024-10-11 18:02:08,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401088455] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:02:08,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882355413] [2024-10-11 18:02:08,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 18:02:08,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:08,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:02:08,245 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:02:08,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-11 18:02:08,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-10-11 18:02:08,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:02:08,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-11 18:02:08,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:02:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 2387 proven. 255 refuted. 0 times theorem prover too weak. 1636 trivial. 0 not checked. [2024-10-11 18:02:08,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:02:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 2451 proven. 191 refuted. 0 times theorem prover too weak. 1636 trivial. 0 not checked. [2024-10-11 18:02:08,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882355413] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:02:08,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:02:08,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2024-10-11 18:02:08,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559530166] [2024-10-11 18:02:08,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:02:08,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-11 18:02:08,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:02:08,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-11 18:02:08,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2024-10-11 18:02:08,871 INFO L87 Difference]: Start difference. First operand 234 states and 255 transitions. Second operand has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 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) [2024-10-11 18:02:09,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:02:09,316 INFO L93 Difference]: Finished difference Result 234 states and 249 transitions. [2024-10-11 18:02:09,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-11 18:02:09,317 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 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 188 [2024-10-11 18:02:09,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:02:09,317 INFO L225 Difference]: With dead ends: 234 [2024-10-11 18:02:09,318 INFO L226 Difference]: Without dead ends: 234 [2024-10-11 18:02:09,318 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 352 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=2250, Unknown=0, NotChecked=0, Total=2862 [2024-10-11 18:02:09,319 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-11 18:02:09,319 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-11 18:02:09,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-10-11 18:02:09,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2024-10-11 18:02:09,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.0686695278969958) internal successors, (249), 233 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 249 transitions. [2024-10-11 18:02:09,324 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 249 transitions. Word has length 188 [2024-10-11 18:02:09,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:02:09,324 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 249 transitions. [2024-10-11 18:02:09,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 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) [2024-10-11 18:02:09,325 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 249 transitions. [2024-10-11 18:02:09,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2024-10-11 18:02:09,325 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:02:09,326 INFO L215 NwaCegarLoop]: trace histogram [55, 55, 54, 10, 9, 9, 9, 1, 1] [2024-10-11 18:02:09,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-11 18:02:09,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-11 18:02:09,530 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:02:09,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:02:09,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1500698346, now seen corresponding path program 6 times [2024-10-11 18:02:09,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:02:09,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069670047] [2024-10-11 18:02:09,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:02:09,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:02:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:02:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5103 backedges. 2934 proven. 201 refuted. 0 times theorem prover too weak. 1968 trivial. 0 not checked. [2024-10-11 18:02:10,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:02:10,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069670047] [2024-10-11 18:02:10,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069670047] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:02:10,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562506014] [2024-10-11 18:02:10,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 18:02:10,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:10,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:02:10,089 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:02:10,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-11 18:02:10,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-10-11 18:02:10,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:02:10,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-11 18:02:10,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:02:10,414 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 1 [2024-10-11 18:02:11,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5103 backedges. 813 proven. 1622 refuted. 0 times theorem prover too weak. 2668 trivial. 0 not checked. [2024-10-11 18:02:11,166 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:02:11,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5103 backedges. 0 proven. 2435 refuted. 0 times theorem prover too weak. 2668 trivial. 0 not checked. [2024-10-11 18:02:11,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562506014] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:02:11,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:02:11,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 13] total 44 [2024-10-11 18:02:11,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260359933] [2024-10-11 18:02:11,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:02:11,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-11 18:02:11,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:02:11,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-11 18:02:11,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1591, Unknown=0, NotChecked=0, Total=1892 [2024-10-11 18:02:11,939 INFO L87 Difference]: Start difference. First operand 234 states and 249 transitions. Second operand has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 44 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:14,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:02:14,669 INFO L93 Difference]: Finished difference Result 292 states and 317 transitions. [2024-10-11 18:02:14,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-10-11 18:02:14,670 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 44 states have internal predecessors, (133), 0 states have call successors, (0), 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 203 [2024-10-11 18:02:14,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:02:14,671 INFO L225 Difference]: With dead ends: 292 [2024-10-11 18:02:14,671 INFO L226 Difference]: Without dead ends: 292 [2024-10-11 18:02:14,674 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4314 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2905, Invalid=12845, Unknown=0, NotChecked=0, Total=15750 [2024-10-11 18:02:14,675 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 363 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 18:02:14,675 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 0 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 18:02:14,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2024-10-11 18:02:14,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 290. [2024-10-11 18:02:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.0899653979238755) internal successors, (315), 289 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:14,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 315 transitions. [2024-10-11 18:02:14,679 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 315 transitions. Word has length 203 [2024-10-11 18:02:14,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:02:14,679 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 315 transitions. [2024-10-11 18:02:14,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.022727272727273) internal successors, (133), 44 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:14,680 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 315 transitions. [2024-10-11 18:02:14,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2024-10-11 18:02:14,681 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:02:14,681 INFO L215 NwaCegarLoop]: trace histogram [73, 73, 72, 11, 10, 10, 10, 1, 1] [2024-10-11 18:02:14,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-11 18:02:14,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-11 18:02:14,882 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:02:14,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:02:14,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1466265409, now seen corresponding path program 7 times [2024-10-11 18:02:14,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:02:14,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23558982] [2024-10-11 18:02:14,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:02:14,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:02:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:02:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8804 backedges. 5603 proven. 261 refuted. 0 times theorem prover too weak. 2940 trivial. 0 not checked. [2024-10-11 18:02:15,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:02:15,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23558982] [2024-10-11 18:02:15,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23558982] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:02:15,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835030977] [2024-10-11 18:02:15,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 18:02:15,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:15,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:02:15,680 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:02:15,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-11 18:02:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:02:15,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-11 18:02:15,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:02:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8804 backedges. 5536 proven. 712 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2024-10-11 18:02:16,208 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:02:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8804 backedges. 5536 proven. 712 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2024-10-11 18:02:16,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835030977] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:02:16,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:02:16,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 41 [2024-10-11 18:02:16,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119782411] [2024-10-11 18:02:16,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:02:16,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-11 18:02:16,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:02:16,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-11 18:02:16,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2024-10-11 18:02:16,495 INFO L87 Difference]: Start difference. First operand 290 states and 315 transitions. Second operand has 41 states, 41 states have (on average 3.682926829268293) internal successors, (151), 41 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:17,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:02:17,546 INFO L93 Difference]: Finished difference Result 290 states and 310 transitions. [2024-10-11 18:02:17,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-10-11 18:02:17,546 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.682926829268293) internal successors, (151), 41 states have internal predecessors, (151), 0 states have call successors, (0), 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 261 [2024-10-11 18:02:17,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:02:17,547 INFO L225 Difference]: With dead ends: 290 [2024-10-11 18:02:17,547 INFO L226 Difference]: Without dead ends: 290 [2024-10-11 18:02:17,549 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 494 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1290, Invalid=5682, Unknown=0, NotChecked=0, Total=6972 [2024-10-11 18:02:17,549 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 18:02:17,549 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 0 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 18:02:17,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2024-10-11 18:02:17,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2024-10-11 18:02:17,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.0726643598615917) internal successors, (310), 289 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:17,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 310 transitions. [2024-10-11 18:02:17,554 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 310 transitions. Word has length 261 [2024-10-11 18:02:17,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:02:17,554 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 310 transitions. [2024-10-11 18:02:17,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.682926829268293) internal successors, (151), 41 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:17,554 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 310 transitions. [2024-10-11 18:02:17,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2024-10-11 18:02:17,560 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:02:17,560 INFO L215 NwaCegarLoop]: trace histogram [76, 76, 75, 11, 10, 10, 10, 1, 1] [2024-10-11 18:02:17,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-11 18:02:17,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:17,761 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:02:17,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:02:17,761 INFO L85 PathProgramCache]: Analyzing trace with hash 2126598438, now seen corresponding path program 8 times [2024-10-11 18:02:17,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:02:17,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913015091] [2024-10-11 18:02:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:02:17,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:02:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:02:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9500 backedges. 6109 proven. 342 refuted. 0 times theorem prover too weak. 3049 trivial. 0 not checked. [2024-10-11 18:02:18,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:02:18,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913015091] [2024-10-11 18:02:18,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913015091] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:02:18,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711923274] [2024-10-11 18:02:18,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 18:02:18,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:18,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:02:18,465 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:02:18,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-11 18:02:18,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 18:02:18,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:02:18,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-11 18:02:18,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:02:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9500 backedges. 6523 proven. 1030 refuted. 0 times theorem prover too weak. 1947 trivial. 0 not checked. [2024-10-11 18:02:18,973 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:02:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9500 backedges. 6523 proven. 1030 refuted. 0 times theorem prover too weak. 1947 trivial. 0 not checked. [2024-10-11 18:02:19,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711923274] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:02:19,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:02:19,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 37 [2024-10-11 18:02:19,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090559111] [2024-10-11 18:02:19,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:02:19,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-10-11 18:02:19,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:02:19,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-10-11 18:02:19,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1077, Unknown=0, NotChecked=0, Total=1332 [2024-10-11 18:02:19,234 INFO L87 Difference]: Start difference. First operand 290 states and 310 transitions. Second operand has 37 states, 37 states have (on average 3.918918918918919) internal successors, (145), 37 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:02:20,272 INFO L93 Difference]: Finished difference Result 290 states and 306 transitions. [2024-10-11 18:02:20,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-10-11 18:02:20,273 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.918918918918919) internal successors, (145), 37 states have internal predecessors, (145), 0 states have call successors, (0), 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 270 [2024-10-11 18:02:20,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:02:20,274 INFO L225 Difference]: With dead ends: 290 [2024-10-11 18:02:20,274 INFO L226 Difference]: Without dead ends: 290 [2024-10-11 18:02:20,275 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 509 SyntacticMatches, 15 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2470 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1487, Invalid=6523, Unknown=0, NotChecked=0, Total=8010 [2024-10-11 18:02:20,275 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 18:02:20,275 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 1601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 18:02:20,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2024-10-11 18:02:20,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2024-10-11 18:02:20,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.0588235294117647) internal successors, (306), 289 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 306 transitions. [2024-10-11 18:02:20,279 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 306 transitions. Word has length 270 [2024-10-11 18:02:20,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:02:20,279 INFO L471 AbstractCegarLoop]: Abstraction has 290 states and 306 transitions. [2024-10-11 18:02:20,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.918918918918919) internal successors, (145), 37 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:20,279 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 306 transitions. [2024-10-11 18:02:20,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2024-10-11 18:02:20,281 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:02:20,281 INFO L215 NwaCegarLoop]: trace histogram [78, 78, 77, 11, 10, 10, 10, 1, 1] [2024-10-11 18:02:20,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-10-11 18:02:20,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-10-11 18:02:20,482 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:02:20,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:02:20,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1709488232, now seen corresponding path program 9 times [2024-10-11 18:02:20,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:02:20,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46594783] [2024-10-11 18:02:20,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:02:20,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:02:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:02:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9979 backedges. 7014 proven. 1633 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2024-10-11 18:02:21,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:02:21,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46594783] [2024-10-11 18:02:21,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46594783] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:02:21,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814335034] [2024-10-11 18:02:21,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 18:02:21,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:21,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:02:21,144 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:02:21,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-11 18:02:21,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-11 18:02:21,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:02:21,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-11 18:02:21,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:02:21,349 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 1 [2024-10-11 18:02:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9979 backedges. 0 proven. 2486 refuted. 0 times theorem prover too weak. 7493 trivial. 0 not checked. [2024-10-11 18:02:21,990 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:02:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9979 backedges. 0 proven. 2486 refuted. 0 times theorem prover too weak. 7493 trivial. 0 not checked. [2024-10-11 18:02:22,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814335034] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:02:22,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:02:22,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 12] total 44 [2024-10-11 18:02:22,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806674633] [2024-10-11 18:02:22,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:02:22,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-10-11 18:02:22,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:02:22,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-10-11 18:02:22,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1610, Unknown=0, NotChecked=0, Total=1980 [2024-10-11 18:02:22,826 INFO L87 Difference]: Start difference. First operand 290 states and 306 transitions. Second operand has 45 states, 45 states have (on average 3.9555555555555557) internal successors, (178), 44 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:24,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:02:24,930 INFO L93 Difference]: Finished difference Result 353 states and 379 transitions. [2024-10-11 18:02:24,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-10-11 18:02:24,930 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.9555555555555557) internal successors, (178), 44 states have internal predecessors, (178), 0 states have call successors, (0), 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 276 [2024-10-11 18:02:24,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:02:24,931 INFO L225 Difference]: With dead ends: 353 [2024-10-11 18:02:24,931 INFO L226 Difference]: Without dead ends: 353 [2024-10-11 18:02:24,933 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3685 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3827, Invalid=12429, Unknown=0, NotChecked=0, Total=16256 [2024-10-11 18:02:24,933 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 187 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 18:02:24,933 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 0 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 18:02:24,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2024-10-11 18:02:24,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 316. [2024-10-11 18:02:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 1.0603174603174603) internal successors, (334), 315 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 334 transitions. [2024-10-11 18:02:24,938 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 334 transitions. Word has length 276 [2024-10-11 18:02:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:02:24,938 INFO L471 AbstractCegarLoop]: Abstraction has 316 states and 334 transitions. [2024-10-11 18:02:24,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.9555555555555557) internal successors, (178), 44 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 334 transitions. [2024-10-11 18:02:24,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2024-10-11 18:02:24,939 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:02:24,939 INFO L215 NwaCegarLoop]: trace histogram [91, 91, 90, 11, 10, 10, 10, 1, 1] [2024-10-11 18:02:24,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-11 18:02:25,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-10-11 18:02:25,140 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:02:25,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:02:25,140 INFO L85 PathProgramCache]: Analyzing trace with hash -298061087, now seen corresponding path program 10 times [2024-10-11 18:02:25,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:02:25,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212814894] [2024-10-11 18:02:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:02:25,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:02:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:02:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 13385 backedges. 1131 proven. 11702 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2024-10-11 18:02:26,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:02:26,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212814894] [2024-10-11 18:02:26,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212814894] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:02:26,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241720127] [2024-10-11 18:02:26,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 18:02:27,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:27,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:02:27,001 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:02:27,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-11 18:02:27,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 18:02:27,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:02:27,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 1338 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-11 18:02:27,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:02:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 13385 backedges. 5339 proven. 6669 refuted. 0 times theorem prover too weak. 1377 trivial. 0 not checked. [2024-10-11 18:02:28,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:02:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13385 backedges. 5339 proven. 6669 refuted. 0 times theorem prover too weak. 1377 trivial. 0 not checked. [2024-10-11 18:02:28,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241720127] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:02:28,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:02:28,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 25, 25] total 71 [2024-10-11 18:02:28,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047284966] [2024-10-11 18:02:28,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:02:28,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-10-11 18:02:28,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:02:28,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-10-11 18:02:28,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=4221, Unknown=0, NotChecked=0, Total=5112 [2024-10-11 18:02:28,514 INFO L87 Difference]: Start difference. First operand 316 states and 334 transitions. Second operand has 72 states, 72 states have (on average 3.6805555555555554) internal successors, (265), 71 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:30,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:02:30,379 INFO L93 Difference]: Finished difference Result 438 states and 462 transitions. [2024-10-11 18:02:30,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-10-11 18:02:30,379 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.6805555555555554) internal successors, (265), 71 states have internal predecessors, (265), 0 states have call successors, (0), 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 315 [2024-10-11 18:02:30,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:02:30,381 INFO L225 Difference]: With dead ends: 438 [2024-10-11 18:02:30,381 INFO L226 Difference]: Without dead ends: 438 [2024-10-11 18:02:30,384 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 780 GetRequests, 592 SyntacticMatches, 17 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12061 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6415, Invalid=23341, Unknown=0, NotChecked=0, Total=29756 [2024-10-11 18:02:30,385 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 33 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 18:02:30,385 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 6 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1338 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 18:02:30,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2024-10-11 18:02:30,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 436. [2024-10-11 18:02:30,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.0574712643678161) internal successors, (460), 435 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:30,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 460 transitions. [2024-10-11 18:02:30,389 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 460 transitions. Word has length 315 [2024-10-11 18:02:30,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:02:30,390 INFO L471 AbstractCegarLoop]: Abstraction has 436 states and 460 transitions. [2024-10-11 18:02:30,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.6805555555555554) internal successors, (265), 71 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:30,390 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 460 transitions. [2024-10-11 18:02:30,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2024-10-11 18:02:30,391 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:02:30,391 INFO L215 NwaCegarLoop]: trace histogram [121, 121, 120, 14, 13, 13, 13, 1, 1] [2024-10-11 18:02:30,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-10-11 18:02:30,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:30,592 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:02:30,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:02:30,593 INFO L85 PathProgramCache]: Analyzing trace with hash -968725130, now seen corresponding path program 11 times [2024-10-11 18:02:30,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:02:30,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406173529] [2024-10-11 18:02:30,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:02:30,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:02:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:02:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 23678 backedges. 14243 proven. 519 refuted. 0 times theorem prover too weak. 8916 trivial. 0 not checked. [2024-10-11 18:02:31,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:02:31,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406173529] [2024-10-11 18:02:31,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406173529] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:02:31,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314348112] [2024-10-11 18:02:31,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 18:02:31,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:31,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:02:31,611 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:02:31,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-11 18:02:32,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2024-10-11 18:02:32,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:02:32,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 1372 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-11 18:02:32,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:02:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 23678 backedges. 15909 proven. 2164 refuted. 0 times theorem prover too weak. 5605 trivial. 0 not checked. [2024-10-11 18:02:33,233 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:02:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 23678 backedges. 16467 proven. 1606 refuted. 0 times theorem prover too weak. 5605 trivial. 0 not checked. [2024-10-11 18:02:33,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314348112] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:02:33,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:02:33,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 52 [2024-10-11 18:02:33,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64771736] [2024-10-11 18:02:33,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:02:33,582 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-10-11 18:02:33,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:02:33,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-10-11 18:02:33,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2175, Unknown=0, NotChecked=0, Total=2652 [2024-10-11 18:02:33,584 INFO L87 Difference]: Start difference. First operand 436 states and 460 transitions. Second operand has 52 states, 52 states have (on average 3.480769230769231) internal successors, (181), 52 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) [2024-10-11 18:02:35,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:02:35,015 INFO L93 Difference]: Finished difference Result 436 states and 455 transitions. [2024-10-11 18:02:35,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-10-11 18:02:35,016 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.480769230769231) internal successors, (181), 52 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) Word has length 417 [2024-10-11 18:02:35,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:02:35,017 INFO L225 Difference]: With dead ends: 436 [2024-10-11 18:02:35,017 INFO L226 Difference]: Without dead ends: 436 [2024-10-11 18:02:35,019 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 921 GetRequests, 791 SyntacticMatches, 16 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4139 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2626, Invalid=10714, Unknown=0, NotChecked=0, Total=13340 [2024-10-11 18:02:35,019 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-11 18:02:35,019 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2001 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-11 18:02:35,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2024-10-11 18:02:35,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2024-10-11 18:02:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 1.0459770114942528) internal successors, (455), 435 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:35,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 455 transitions. [2024-10-11 18:02:35,025 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 455 transitions. Word has length 417 [2024-10-11 18:02:35,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:02:35,026 INFO L471 AbstractCegarLoop]: Abstraction has 436 states and 455 transitions. [2024-10-11 18:02:35,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.480769230769231) internal successors, (181), 52 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) [2024-10-11 18:02:35,026 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 455 transitions. [2024-10-11 18:02:35,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2024-10-11 18:02:35,028 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:02:35,028 INFO L215 NwaCegarLoop]: trace histogram [124, 124, 123, 14, 13, 13, 13, 1, 1] [2024-10-11 18:02:35,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-10-11 18:02:35,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:35,229 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:02:35,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:02:35,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1339488367, now seen corresponding path program 12 times [2024-10-11 18:02:35,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:02:35,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865895365] [2024-10-11 18:02:35,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:02:35,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:02:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:02:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 24815 backedges. 15076 proven. 621 refuted. 0 times theorem prover too weak. 9118 trivial. 0 not checked. [2024-10-11 18:02:36,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:02:36,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865895365] [2024-10-11 18:02:36,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865895365] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:02:36,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984372158] [2024-10-11 18:02:36,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 18:02:36,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:36,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:02:36,416 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:02:36,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-11 18:02:37,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2024-10-11 18:02:37,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:02:37,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-11 18:02:37,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:02:37,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 18:02:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 24815 backedges. 3980 proven. 7599 refuted. 0 times theorem prover too weak. 13236 trivial. 0 not checked. [2024-10-11 18:02:38,848 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:02:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 24815 backedges. 0 proven. 11579 refuted. 0 times theorem prover too weak. 13236 trivial. 0 not checked. [2024-10-11 18:02:40,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984372158] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:02:40,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:02:40,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 21, 21] total 70 [2024-10-11 18:02:40,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120660316] [2024-10-11 18:02:40,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:02:40,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-10-11 18:02:40,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:02:40,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-10-11 18:02:40,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=856, Invalid=3974, Unknown=0, NotChecked=0, Total=4830 [2024-10-11 18:02:40,392 INFO L87 Difference]: Start difference. First operand 436 states and 455 transitions. Second operand has 70 states, 70 states have (on average 3.0285714285714285) internal successors, (212), 70 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:02:47,626 INFO L93 Difference]: Finished difference Result 703 states and 775 transitions. [2024-10-11 18:02:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2024-10-11 18:02:47,626 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.0285714285714285) internal successors, (212), 70 states have internal predecessors, (212), 0 states have call successors, (0), 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 426 [2024-10-11 18:02:47,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:02:47,628 INFO L225 Difference]: With dead ends: 703 [2024-10-11 18:02:47,628 INFO L226 Difference]: Without dead ends: 703 [2024-10-11 18:02:47,631 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1054 GetRequests, 810 SyntacticMatches, 0 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19013 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=10869, Invalid=49401, Unknown=0, NotChecked=0, Total=60270 [2024-10-11 18:02:47,632 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 923 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 18:02:47,632 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 0 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1440 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 18:02:47,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2024-10-11 18:02:47,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 604. [2024-10-11 18:02:47,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 1.0912106135986732) internal successors, (658), 603 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:47,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 658 transitions. [2024-10-11 18:02:47,637 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 658 transitions. Word has length 426 [2024-10-11 18:02:47,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:02:47,638 INFO L471 AbstractCegarLoop]: Abstraction has 604 states and 658 transitions. [2024-10-11 18:02:47,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.0285714285714285) internal successors, (212), 70 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:47,638 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 658 transitions. [2024-10-11 18:02:47,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2024-10-11 18:02:47,640 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:02:47,640 INFO L215 NwaCegarLoop]: trace histogram [172, 172, 171, 16, 15, 15, 15, 1, 1] [2024-10-11 18:02:47,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-10-11 18:02:47,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-10-11 18:02:47,841 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:02:47,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:02:47,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1057179297, now seen corresponding path program 13 times [2024-10-11 18:02:47,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:02:47,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618244075] [2024-10-11 18:02:47,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:02:47,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:02:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:02:49,326 INFO L134 CoverageAnalysis]: Checked inductivity of 47133 backedges. 31931 proven. 3788 refuted. 0 times theorem prover too weak. 11414 trivial. 0 not checked. [2024-10-11 18:02:49,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:02:49,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618244075] [2024-10-11 18:02:49,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618244075] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:02:49,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229510686] [2024-10-11 18:02:49,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 18:02:49,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:49,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:02:49,328 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:02:49,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-11 18:02:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:02:49,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 2379 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-11 18:02:49,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:02:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 47133 backedges. 32517 proven. 3202 refuted. 0 times theorem prover too weak. 11414 trivial. 0 not checked. [2024-10-11 18:02:50,099 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:02:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 47133 backedges. 32517 proven. 3202 refuted. 0 times theorem prover too weak. 11414 trivial. 0 not checked. [2024-10-11 18:02:50,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229510686] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:02:50,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:02:50,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 41 [2024-10-11 18:02:50,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502945844] [2024-10-11 18:02:50,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:02:50,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-10-11 18:02:50,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:02:50,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-10-11 18:02:50,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2024-10-11 18:02:50,455 INFO L87 Difference]: Start difference. First operand 604 states and 658 transitions. Second operand has 42 states, 42 states have (on average 4.142857142857143) internal successors, (174), 41 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:51,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:02:51,745 INFO L93 Difference]: Finished difference Result 604 states and 653 transitions. [2024-10-11 18:02:51,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2024-10-11 18:02:51,745 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.142857142857143) internal successors, (174), 41 states have internal predecessors, (174), 0 states have call successors, (0), 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 578 [2024-10-11 18:02:51,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:02:51,747 INFO L225 Difference]: With dead ends: 604 [2024-10-11 18:02:51,747 INFO L226 Difference]: Without dead ends: 604 [2024-10-11 18:02:51,749 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1271 GetRequests, 1117 SyntacticMatches, 23 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5736 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4754, Invalid=12802, Unknown=0, NotChecked=0, Total=17556 [2024-10-11 18:02:51,750 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-11 18:02:51,750 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 48 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-11 18:02:51,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2024-10-11 18:02:51,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 604. [2024-10-11 18:02:51,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 1.0829187396351576) internal successors, (653), 603 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:51,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 653 transitions. [2024-10-11 18:02:51,757 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 653 transitions. Word has length 578 [2024-10-11 18:02:51,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:02:51,757 INFO L471 AbstractCegarLoop]: Abstraction has 604 states and 653 transitions. [2024-10-11 18:02:51,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.142857142857143) internal successors, (174), 41 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:51,758 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 653 transitions. [2024-10-11 18:02:51,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2024-10-11 18:02:51,760 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:02:51,760 INFO L215 NwaCegarLoop]: trace histogram [173, 173, 172, 16, 15, 15, 15, 1, 1] [2024-10-11 18:02:51,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-10-11 18:02:51,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:51,960 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:02:51,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:02:51,961 INFO L85 PathProgramCache]: Analyzing trace with hash 426557242, now seen corresponding path program 14 times [2024-10-11 18:02:51,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:02:51,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174166857] [2024-10-11 18:02:51,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:02:51,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:02:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:02:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 47664 backedges. 23017 proven. 16279 refuted. 0 times theorem prover too weak. 8368 trivial. 0 not checked. [2024-10-11 18:02:53,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:02:53,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174166857] [2024-10-11 18:02:53,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174166857] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:02:53,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653509403] [2024-10-11 18:02:53,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 18:02:53,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:53,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:02:53,413 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:02:53,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-11 18:02:53,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 18:02:53,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:02:53,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 2390 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-11 18:02:53,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:02:54,320 INFO L134 CoverageAnalysis]: Checked inductivity of 47664 backedges. 23057 proven. 16239 refuted. 0 times theorem prover too weak. 8368 trivial. 0 not checked. [2024-10-11 18:02:54,320 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:02:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 47664 backedges. 23057 proven. 16239 refuted. 0 times theorem prover too weak. 8368 trivial. 0 not checked. [2024-10-11 18:02:54,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653509403] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:02:54,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:02:54,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 60 [2024-10-11 18:02:54,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523801054] [2024-10-11 18:02:54,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:02:54,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-10-11 18:02:54,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:02:54,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-10-11 18:02:54,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=753, Invalid=2907, Unknown=0, NotChecked=0, Total=3660 [2024-10-11 18:02:54,821 INFO L87 Difference]: Start difference. First operand 604 states and 653 transitions. Second operand has 61 states, 61 states have (on average 3.819672131147541) internal successors, (233), 60 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:56,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:02:56,769 INFO L93 Difference]: Finished difference Result 652 states and 702 transitions. [2024-10-11 18:02:56,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-10-11 18:02:56,769 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.819672131147541) internal successors, (233), 60 states have internal predecessors, (233), 0 states have call successors, (0), 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 581 [2024-10-11 18:02:56,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:02:56,771 INFO L225 Difference]: With dead ends: 652 [2024-10-11 18:02:56,771 INFO L226 Difference]: Without dead ends: 652 [2024-10-11 18:02:56,772 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1306 GetRequests, 1118 SyntacticMatches, 13 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10738 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6913, Invalid=24239, Unknown=0, NotChecked=0, Total=31152 [2024-10-11 18:02:56,773 INFO L432 NwaCegarLoop]: 1 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-11 18:02:56,773 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 6 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-11 18:02:56,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2024-10-11 18:02:56,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 650. [2024-10-11 18:02:56,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 1.078582434514638) internal successors, (700), 649 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:56,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 700 transitions. [2024-10-11 18:02:56,778 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 700 transitions. Word has length 581 [2024-10-11 18:02:56,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:02:56,779 INFO L471 AbstractCegarLoop]: Abstraction has 650 states and 700 transitions. [2024-10-11 18:02:56,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.819672131147541) internal successors, (233), 60 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:02:56,780 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 700 transitions. [2024-10-11 18:02:56,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2024-10-11 18:02:56,782 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:02:56,782 INFO L215 NwaCegarLoop]: trace histogram [186, 186, 185, 17, 16, 16, 16, 1, 1] [2024-10-11 18:02:56,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-10-11 18:02:56,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-10-11 18:02:56,983 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:02:56,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:02:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1652501960, now seen corresponding path program 15 times [2024-10-11 18:02:56,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:02:56,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172310443] [2024-10-11 18:02:56,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:02:56,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:02:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:02:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 55087 backedges. 38728 proven. 4698 refuted. 0 times theorem prover too weak. 11661 trivial. 0 not checked. [2024-10-11 18:02:58,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:02:58,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172310443] [2024-10-11 18:02:58,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172310443] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:02:58,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448441896] [2024-10-11 18:02:58,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 18:02:58,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:02:58,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:02:58,429 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:02:58,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-11 18:02:59,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2024-10-11 18:02:59,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:02:59,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-10-11 18:02:59,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:02:59,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 18:03:00,843 INFO L134 CoverageAnalysis]: Checked inductivity of 55087 backedges. 0 proven. 12374 refuted. 0 times theorem prover too weak. 42713 trivial. 0 not checked. [2024-10-11 18:03:00,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 18:03:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 55087 backedges. 0 proven. 12374 refuted. 0 times theorem prover too weak. 42713 trivial. 0 not checked. [2024-10-11 18:03:02,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448441896] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 18:03:02,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 18:03:02,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24, 24] total 76 [2024-10-11 18:03:02,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744716468] [2024-10-11 18:03:02,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 18:03:02,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-10-11 18:03:02,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 18:03:02,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-10-11 18:03:02,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=5105, Unknown=0, NotChecked=0, Total=5852 [2024-10-11 18:03:02,881 INFO L87 Difference]: Start difference. First operand 650 states and 700 transitions. Second operand has 77 states, 77 states have (on average 3.7662337662337664) internal successors, (290), 76 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:03:10,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-11 18:03:10,457 INFO L93 Difference]: Finished difference Result 808 states and 884 transitions. [2024-10-11 18:03:10,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2024-10-11 18:03:10,459 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.7662337662337664) internal successors, (290), 76 states have internal predecessors, (290), 0 states have call successors, (0), 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 624 [2024-10-11 18:03:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-11 18:03:10,461 INFO L225 Difference]: With dead ends: 808 [2024-10-11 18:03:10,461 INFO L226 Difference]: Without dead ends: 808 [2024-10-11 18:03:10,465 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1440 GetRequests, 1199 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13946 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=9023, Invalid=49783, Unknown=0, NotChecked=0, Total=58806 [2024-10-11 18:03:10,466 INFO L432 NwaCegarLoop]: 0 mSDtfsCounter, 384 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11381 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 11381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-10-11 18:03:10,466 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 0 Invalid, 11414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 11381 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-10-11 18:03:10,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2024-10-11 18:03:10,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 658. [2024-10-11 18:03:10,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 1.0624048706240488) internal successors, (698), 657 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:03:10,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 698 transitions. [2024-10-11 18:03:10,473 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 698 transitions. Word has length 624 [2024-10-11 18:03:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-11 18:03:10,474 INFO L471 AbstractCegarLoop]: Abstraction has 658 states and 698 transitions. [2024-10-11 18:03:10,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.7662337662337664) internal successors, (290), 76 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 18:03:10,474 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 698 transitions. [2024-10-11 18:03:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 658 [2024-10-11 18:03:10,476 INFO L207 NwaCegarLoop]: Found error trace [2024-10-11 18:03:10,477 INFO L215 NwaCegarLoop]: trace histogram [197, 197, 196, 17, 16, 16, 16, 1, 1] [2024-10-11 18:03:10,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-10-11 18:03:10,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-10-11 18:03:10,677 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2024-10-11 18:03:10,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 18:03:10,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1101432417, now seen corresponding path program 16 times [2024-10-11 18:03:10,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 18:03:10,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951046580] [2024-10-11 18:03:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 18:03:10,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 18:03:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 18:03:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 61566 backedges. 46916 proven. 6926 refuted. 0 times theorem prover too weak. 7724 trivial. 0 not checked. [2024-10-11 18:03:12,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 18:03:12,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951046580] [2024-10-11 18:03:12,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951046580] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 18:03:12,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003787030] [2024-10-11 18:03:12,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 18:03:12,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 18:03:12,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 18:03:12,470 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 18:03:12,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-10-11 18:03:14,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 18:03:14,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 18:03:14,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 2684 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-11 18:03:14,607 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 18:03:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 61566 backedges. 1912 proven. 56190 refuted. 0 times theorem prover too weak. 3464 trivial. 0 not checked. [2024-10-11 18:03:16,188 INFO L311 TraceCheckSpWp]: Computing backward predicates...