./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_update_all.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e86102617f1813255879beda7bab492587801800e6506c4c5cd56fb9179f8713 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 18:15:40,982 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 18:15:41,063 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 18:15:41,069 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 18:15:41,070 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 18:15:41,096 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 18:15:41,097 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 18:15:41,097 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 18:15:41,098 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 18:15:41,098 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 18:15:41,099 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 18:15:41,099 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 18:15:41,101 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 18:15:41,103 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 18:15:41,103 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 18:15:41,104 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 18:15:41,104 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 18:15:41,104 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 18:15:41,105 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 18:15:41,105 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 18:15:41,108 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 18:15:41,109 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 18:15:41,109 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 18:15:41,110 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 18:15:41,110 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 18:15:41,110 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 18:15:41,110 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 18:15:41,111 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 18:15:41,111 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 18:15:41,111 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 18:15:41,111 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 18:15:41,112 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 18:15:41,112 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 18:15:41,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 18:15:41,113 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 18:15:41,113 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 18:15:41,113 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 18:15:41,114 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 18:15:41,114 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 18:15:41,114 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 18:15:41,114 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 18:15:41,116 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 18:15:41,116 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e86102617f1813255879beda7bab492587801800e6506c4c5cd56fb9179f8713 [2024-10-14 18:15:41,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 18:15:41,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 18:15:41,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 18:15:41,393 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 18:15:41,393 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 18:15:41,394 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_update_all.i [2024-10-14 18:15:42,856 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 18:15:43,094 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 18:15:43,094 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_update_all.i [2024-10-14 18:15:43,111 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0b3b3deb/a14fdaea5a2149ee8ac02323df4698bb/FLAG12a0e7f08 [2024-10-14 18:15:43,436 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0b3b3deb/a14fdaea5a2149ee8ac02323df4698bb [2024-10-14 18:15:43,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 18:15:43,439 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 18:15:43,441 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 18:15:43,441 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 18:15:43,446 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 18:15:43,447 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:15:43" (1/1) ... [2024-10-14 18:15:43,448 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e7049d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:15:43, skipping insertion in model container [2024-10-14 18:15:43,448 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 06:15:43" (1/1) ... [2024-10-14 18:15:43,506 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 18:15:43,845 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 18:15:43,859 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 18:15:43,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 18:15:43,951 INFO L204 MainTranslator]: Completed translation [2024-10-14 18:15:43,951 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:15:43 WrapperNode [2024-10-14 18:15:43,951 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 18:15:43,953 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 18:15:43,953 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 18:15:43,953 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 18:15:43,966 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:15:43" (1/1) ... [2024-10-14 18:15:43,984 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:15:43" (1/1) ... [2024-10-14 18:15:44,017 INFO L138 Inliner]: procedures = 126, calls = 27, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 140 [2024-10-14 18:15:44,020 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 18:15:44,021 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 18:15:44,021 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 18:15:44,021 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 18:15:44,032 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:15:43" (1/1) ... [2024-10-14 18:15:44,033 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:15:43" (1/1) ... [2024-10-14 18:15:44,043 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:15:43" (1/1) ... [2024-10-14 18:15:44,066 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2024-10-14 18:15:44,066 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:15:43" (1/1) ... [2024-10-14 18:15:44,067 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:15:43" (1/1) ... [2024-10-14 18:15:44,079 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:15:43" (1/1) ... [2024-10-14 18:15:44,084 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:15:43" (1/1) ... [2024-10-14 18:15:44,086 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:15:43" (1/1) ... [2024-10-14 18:15:44,087 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:15:43" (1/1) ... [2024-10-14 18:15:44,090 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 18:15:44,091 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 18:15:44,091 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 18:15:44,091 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 18:15:44,092 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:15:43" (1/1) ... [2024-10-14 18:15:44,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 18:15:44,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:15:44,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 18:15:44,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 18:15:44,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 18:15:44,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 18:15:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 18:15:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 18:15:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-10-14 18:15:44,180 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-10-14 18:15:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 18:15:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 18:15:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-14 18:15:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-14 18:15:44,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-14 18:15:44,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-14 18:15:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-14 18:15:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 18:15:44,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 18:15:44,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 18:15:44,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 18:15:44,314 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 18:15:44,316 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 18:15:44,600 INFO L? ?]: Removed 94 outVars from TransFormulas that were not future-live. [2024-10-14 18:15:44,600 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 18:15:44,647 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 18:15:44,648 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-14 18:15:44,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:15:44 BoogieIcfgContainer [2024-10-14 18:15:44,649 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 18:15:44,652 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 18:15:44,653 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 18:15:44,657 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 18:15:44,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 06:15:43" (1/3) ... [2024-10-14 18:15:44,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac5ddf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:15:44, skipping insertion in model container [2024-10-14 18:15:44,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 06:15:43" (2/3) ... [2024-10-14 18:15:44,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac5ddf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 06:15:44, skipping insertion in model container [2024-10-14 18:15:44,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 06:15:44" (3/3) ... [2024-10-14 18:15:44,659 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_update_all.i [2024-10-14 18:15:44,676 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 18:15:44,676 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2024-10-14 18:15:44,717 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 18:15:44,725 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;@5fdf5aa3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 18:15:44,725 INFO L334 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2024-10-14 18:15:44,730 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 37 states have (on average 2.189189189189189) internal successors, (81), 65 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:15:44,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-14 18:15:44,736 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:15:44,737 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-14 18:15:44,737 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:15:44,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:15:44,743 INFO L85 PathProgramCache]: Analyzing trace with hash 209499439, now seen corresponding path program 1 times [2024-10-14 18:15:44,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:15:44,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633855126] [2024-10-14 18:15:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:44,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:15:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:15:45,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:15:45,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633855126] [2024-10-14 18:15:45,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633855126] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:15:45,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:15:45,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 18:15:45,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744760900] [2024-10-14 18:15:45,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:15:45,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 18:15:45,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:15:45,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 18:15:45,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 18:15:45,091 INFO L87 Difference]: Start difference. First operand has 69 states, 37 states have (on average 2.189189189189189) internal successors, (81), 65 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 18:15:45,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:15:45,237 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2024-10-14 18:15:45,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 18:15:45,240 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-14 18:15:45,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:15:45,250 INFO L225 Difference]: With dead ends: 66 [2024-10-14 18:15:45,250 INFO L226 Difference]: Without dead ends: 64 [2024-10-14 18:15:45,251 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 [2024-10-14 18:15:45,256 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:15:45,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 98 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:15:45,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-14 18:15:45,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-10-14 18:15:45,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 60 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:15:45,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2024-10-14 18:15:45,291 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 5 [2024-10-14 18:15:45,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:15:45,291 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2024-10-14 18:15:45,291 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 18:15:45,291 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2024-10-14 18:15:45,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-10-14 18:15:45,291 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:15:45,291 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-10-14 18:15:45,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 18:15:45,292 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:15:45,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:15:45,293 INFO L85 PathProgramCache]: Analyzing trace with hash 209499440, now seen corresponding path program 1 times [2024-10-14 18:15:45,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:15:45,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892092317] [2024-10-14 18:15:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:45,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:15:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:15:45,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:15:45,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892092317] [2024-10-14 18:15:45,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892092317] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:15:45,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:15:45,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 18:15:45,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819735221] [2024-10-14 18:15:45,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:15:45,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 18:15:45,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:15:45,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 18:15:45,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 18:15:45,447 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 18:15:45,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:15:45,501 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2024-10-14 18:15:45,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 18:15:45,502 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-10-14 18:15:45,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:15:45,503 INFO L225 Difference]: With dead ends: 62 [2024-10-14 18:15:45,503 INFO L226 Difference]: Without dead ends: 62 [2024-10-14 18:15:45,503 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 [2024-10-14 18:15:45,506 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 1 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 18:15:45,507 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 101 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 18:15:45,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-14 18:15:45,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-10-14 18:15:45,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 58 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:15:45,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2024-10-14 18:15:45,514 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 5 [2024-10-14 18:15:45,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:15:45,514 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2024-10-14 18:15:45,514 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 18:15:45,515 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2024-10-14 18:15:45,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-14 18:15:45,515 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:15:45,515 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:15:45,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 18:15:45,516 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:15:45,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:15:45,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1748640650, now seen corresponding path program 1 times [2024-10-14 18:15:45,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:15:45,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325643964] [2024-10-14 18:15:45,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:45,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:15:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:45,639 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:15:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:15:45,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:15:45,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325643964] [2024-10-14 18:15:45,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325643964] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:15:45,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:15:45,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 18:15:45,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460726076] [2024-10-14 18:15:45,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:15:45,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 18:15:45,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:15:45,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 18:15:45,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 18:15:45,680 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:15:45,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:15:45,766 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2024-10-14 18:15:45,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 18:15:45,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-10-14 18:15:45,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:15:45,772 INFO L225 Difference]: With dead ends: 68 [2024-10-14 18:15:45,772 INFO L226 Difference]: Without dead ends: 68 [2024-10-14 18:15:45,773 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 18:15:45,774 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 4 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:15:45,774 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 138 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:15:45,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-10-14 18:15:45,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2024-10-14 18:15:45,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 59 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:15:45,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2024-10-14 18:15:45,784 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 10 [2024-10-14 18:15:45,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:15:45,785 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2024-10-14 18:15:45,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-14 18:15:45,785 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2024-10-14 18:15:45,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-14 18:15:45,786 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:15:45,786 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:15:45,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 18:15:45,786 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:15:45,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:15:45,787 INFO L85 PathProgramCache]: Analyzing trace with hash 420391556, now seen corresponding path program 1 times [2024-10-14 18:15:45,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:15:45,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882979124] [2024-10-14 18:15:45,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:45,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:15:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:45,948 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:15:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:45,966 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:15:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 18:15:46,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:15:46,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882979124] [2024-10-14 18:15:46,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882979124] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:15:46,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:15:46,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 18:15:46,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726284709] [2024-10-14 18:15:46,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:15:46,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 18:15:46,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:15:46,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 18:15:46,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-14 18:15:46,043 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:15:46,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:15:46,189 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2024-10-14 18:15:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 18:15:46,189 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-10-14 18:15:46,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:15:46,190 INFO L225 Difference]: With dead ends: 62 [2024-10-14 18:15:46,190 INFO L226 Difference]: Without dead ends: 62 [2024-10-14 18:15:46,190 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-14 18:15:46,192 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 1 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:15:46,193 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 227 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:15:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-14 18:15:46,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-10-14 18:15:46,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 58 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:15:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2024-10-14 18:15:46,198 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 17 [2024-10-14 18:15:46,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:15:46,198 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2024-10-14 18:15:46,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:15:46,199 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2024-10-14 18:15:46,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-14 18:15:46,199 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:15:46,199 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:15:46,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 18:15:46,200 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:15:46,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:15:46,201 INFO L85 PathProgramCache]: Analyzing trace with hash 420391557, now seen corresponding path program 1 times [2024-10-14 18:15:46,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:15:46,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548675761] [2024-10-14 18:15:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:46,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:15:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:46,399 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:15:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:46,412 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:15:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:15:46,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:15:46,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548675761] [2024-10-14 18:15:46,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548675761] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:15:46,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:15:46,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-14 18:15:46,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870391589] [2024-10-14 18:15:46,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:15:46,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 18:15:46,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:15:46,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 18:15:46,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-14 18:15:46,506 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:15:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:15:46,624 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2024-10-14 18:15:46,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 18:15:46,625 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-10-14 18:15:46,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:15:46,625 INFO L225 Difference]: With dead ends: 61 [2024-10-14 18:15:46,626 INFO L226 Difference]: Without dead ends: 61 [2024-10-14 18:15:46,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-10-14 18:15:46,627 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:15:46,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 247 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:15:46,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-14 18:15:46,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-10-14 18:15:46,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 57 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:15:46,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2024-10-14 18:15:46,632 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 17 [2024-10-14 18:15:46,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:15:46,632 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2024-10-14 18:15:46,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:15:46,633 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2024-10-14 18:15:46,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-14 18:15:46,633 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:15:46,634 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:15:46,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 18:15:46,634 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:15:46,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:15:46,635 INFO L85 PathProgramCache]: Analyzing trace with hash 269529954, now seen corresponding path program 1 times [2024-10-14 18:15:46,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:15:46,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135257924] [2024-10-14 18:15:46,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:46,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:15:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:46,808 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:15:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:46,850 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:15:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 18:15:46,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:15:46,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135257924] [2024-10-14 18:15:46,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135257924] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:15:46,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328201057] [2024-10-14 18:15:46,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:46,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:15:46,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:15:46,985 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:15:46,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 18:15:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:47,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 18:15:47,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:15:47,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 18:15:47,216 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2024-10-14 18:15:47,252 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-10-14 18:15:47,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-10-14 18:15:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2024-10-14 18:15:47,270 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:15:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:15:47,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328201057] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:15:47,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:15:47,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 11 [2024-10-14 18:15:47,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071299873] [2024-10-14 18:15:47,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:15:47,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 18:15:47,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:15:47,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 18:15:47,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2024-10-14 18:15:47,451 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-14 18:15:47,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:15:47,682 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2024-10-14 18:15:47,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 18:15:47,682 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2024-10-14 18:15:47,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:15:47,683 INFO L225 Difference]: With dead ends: 60 [2024-10-14 18:15:47,683 INFO L226 Difference]: Without dead ends: 60 [2024-10-14 18:15:47,683 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=119, Unknown=1, NotChecked=22, Total=182 [2024-10-14 18:15:47,684 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 18:15:47,684 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 281 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2024-10-14 18:15:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-14 18:15:47,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-10-14 18:15:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.75) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:15:47,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2024-10-14 18:15:47,694 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 19 [2024-10-14 18:15:47,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:15:47,694 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2024-10-14 18:15:47,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-14 18:15:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2024-10-14 18:15:47,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-14 18:15:47,695 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:15:47,695 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:15:47,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-14 18:15:47,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-14 18:15:47,896 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:15:47,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:15:47,897 INFO L85 PathProgramCache]: Analyzing trace with hash 269529955, now seen corresponding path program 1 times [2024-10-14 18:15:47,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:15:47,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641989166] [2024-10-14 18:15:47,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:47,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:15:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:48,138 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:15:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:48,277 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:15:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:15:48,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:15:48,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641989166] [2024-10-14 18:15:48,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641989166] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:15:48,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737501632] [2024-10-14 18:15:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:48,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:15:48,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:15:48,415 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:15:48,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 18:15:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:48,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-14 18:15:48,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:15:48,547 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 [2024-10-14 18:15:48,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 18:15:48,642 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-10-14 18:15:48,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:15:48,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-14 18:15:48,691 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:15:48,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:15:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-10-14 18:15:48,708 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:15:48,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737501632] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:15:48,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:15:48,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2024-10-14 18:15:48,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940806881] [2024-10-14 18:15:48,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:15:48,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 18:15:48,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:15:48,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 18:15:48,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=149, Unknown=1, NotChecked=24, Total=210 [2024-10-14 18:15:48,832 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 13 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 18:15:49,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:15:49,073 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2024-10-14 18:15:49,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 18:15:49,073 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2024-10-14 18:15:49,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:15:49,075 INFO L225 Difference]: With dead ends: 66 [2024-10-14 18:15:49,075 INFO L226 Difference]: Without dead ends: 66 [2024-10-14 18:15:49,076 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=197, Unknown=1, NotChecked=28, Total=272 [2024-10-14 18:15:49,076 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 1 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 18:15:49,077 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 284 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 239 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2024-10-14 18:15:49,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-14 18:15:49,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2024-10-14 18:15:49,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 40 states have (on average 1.7) internal successors, (68), 60 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 18:15:49,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2024-10-14 18:15:49,090 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 19 [2024-10-14 18:15:49,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:15:49,091 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2024-10-14 18:15:49,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 18:15:49,091 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2024-10-14 18:15:49,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-14 18:15:49,092 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:15:49,092 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:15:49,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 18:15:49,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-14 18:15:49,297 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:15:49,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:15:49,298 INFO L85 PathProgramCache]: Analyzing trace with hash -2017091990, now seen corresponding path program 1 times [2024-10-14 18:15:49,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:15:49,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573122075] [2024-10-14 18:15:49,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:49,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:15:49,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:49,460 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:15:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:49,469 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:15:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 18:15:49,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:15:49,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573122075] [2024-10-14 18:15:49,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573122075] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:15:49,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:15:49,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-14 18:15:49,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981836834] [2024-10-14 18:15:49,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:15:49,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 18:15:49,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:15:49,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 18:15:49,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-14 18:15:49,521 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 10 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:15:49,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:15:49,710 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2024-10-14 18:15:49,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 18:15:49,712 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-10-14 18:15:49,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:15:49,714 INFO L225 Difference]: With dead ends: 68 [2024-10-14 18:15:49,714 INFO L226 Difference]: Without dead ends: 68 [2024-10-14 18:15:49,714 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-10-14 18:15:49,715 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 35 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 18:15:49,715 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 286 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 18:15:49,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-10-14 18:15:49,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-10-14 18:15:49,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 63 states have internal predecessors, (74), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 18:15:49,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2024-10-14 18:15:49,724 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 22 [2024-10-14 18:15:49,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:15:49,724 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2024-10-14 18:15:49,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:15:49,725 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2024-10-14 18:15:49,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-10-14 18:15:49,725 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:15:49,725 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:15:49,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-14 18:15:49,725 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:15:49,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:15:49,726 INFO L85 PathProgramCache]: Analyzing trace with hash -2017091989, now seen corresponding path program 1 times [2024-10-14 18:15:49,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:15:49,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981473636] [2024-10-14 18:15:49,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:49,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:15:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:49,974 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:15:49,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:49,982 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:15:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:15:50,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:15:50,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981473636] [2024-10-14 18:15:50,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981473636] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:15:50,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:15:50,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-14 18:15:50,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583439162] [2024-10-14 18:15:50,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:15:50,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 18:15:50,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:15:50,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 18:15:50,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-14 18:15:50,062 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:15:50,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:15:50,256 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2024-10-14 18:15:50,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 18:15:50,257 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-10-14 18:15:50,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:15:50,258 INFO L225 Difference]: With dead ends: 68 [2024-10-14 18:15:50,258 INFO L226 Difference]: Without dead ends: 68 [2024-10-14 18:15:50,258 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-10-14 18:15:50,260 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 32 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 18:15:50,261 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 326 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 18:15:50,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-10-14 18:15:50,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-10-14 18:15:50,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.6744186046511629) internal successors, (72), 63 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 18:15:50,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2024-10-14 18:15:50,266 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 22 [2024-10-14 18:15:50,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:15:50,271 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2024-10-14 18:15:50,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:15:50,271 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2024-10-14 18:15:50,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-14 18:15:50,272 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:15:50,272 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:15:50,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-14 18:15:50,272 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:15:50,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:15:50,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1396384217, now seen corresponding path program 1 times [2024-10-14 18:15:50,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:15:50,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606774933] [2024-10-14 18:15:50,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:50,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:15:50,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:50,349 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:15:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:50,358 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:15:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:15:50,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:15:50,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606774933] [2024-10-14 18:15:50,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606774933] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:15:50,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:15:50,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 18:15:50,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927494149] [2024-10-14 18:15:50,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:15:50,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 18:15:50,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:15:50,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 18:15:50,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 18:15:50,372 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:15:50,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:15:50,451 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2024-10-14 18:15:50,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 18:15:50,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2024-10-14 18:15:50,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:15:50,452 INFO L225 Difference]: With dead ends: 88 [2024-10-14 18:15:50,452 INFO L226 Difference]: Without dead ends: 88 [2024-10-14 18:15:50,452 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 18:15:50,453 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 16 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:15:50,454 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 170 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:15:50,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-10-14 18:15:50,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2024-10-14 18:15:50,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 65 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 18:15:50,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2024-10-14 18:15:50,457 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 24 [2024-10-14 18:15:50,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:15:50,458 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2024-10-14 18:15:50,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:15:50,458 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2024-10-14 18:15:50,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-14 18:15:50,459 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:15:50,459 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:15:50,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-14 18:15:50,459 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:15:50,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:15:50,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1396384272, now seen corresponding path program 1 times [2024-10-14 18:15:50,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:15:50,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951760900] [2024-10-14 18:15:50,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:50,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:15:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:50,568 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:15:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:50,576 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:15:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 18:15:50,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:15:50,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951760900] [2024-10-14 18:15:50,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951760900] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:15:50,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:15:50,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-14 18:15:50,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454672426] [2024-10-14 18:15:50,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:15:50,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 18:15:50,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:15:50,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 18:15:50,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-14 18:15:50,613 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:15:50,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:15:50,800 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2024-10-14 18:15:50,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 18:15:50,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2024-10-14 18:15:50,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:15:50,801 INFO L225 Difference]: With dead ends: 73 [2024-10-14 18:15:50,802 INFO L226 Difference]: Without dead ends: 73 [2024-10-14 18:15:50,802 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-10-14 18:15:50,803 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 33 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 18:15:50,803 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 286 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 18:15:50,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-14 18:15:50,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-10-14 18:15:50,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.6875) internal successors, (81), 68 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 18:15:50,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2024-10-14 18:15:50,807 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 24 [2024-10-14 18:15:50,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:15:50,807 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2024-10-14 18:15:50,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:15:50,808 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2024-10-14 18:15:50,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-14 18:15:50,812 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:15:50,812 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:15:50,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-14 18:15:50,812 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:15:50,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:15:50,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1396384271, now seen corresponding path program 1 times [2024-10-14 18:15:50,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:15:50,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583898926] [2024-10-14 18:15:50,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:50,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:15:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:50,930 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:15:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:50,942 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:15:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 18:15:50,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:15:50,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583898926] [2024-10-14 18:15:50,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583898926] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:15:50,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442049801] [2024-10-14 18:15:50,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:50,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:15:50,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:15:50,956 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:15:50,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 18:15:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:51,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 18:15:51,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:15:51,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:15:51,104 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 18:15:51,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442049801] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:15:51,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 18:15:51,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2024-10-14 18:15:51,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515469286] [2024-10-14 18:15:51,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:15:51,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 18:15:51,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:15:51,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 18:15:51,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-14 18:15:51,108 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:15:51,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:15:51,149 INFO L93 Difference]: Finished difference Result 90 states and 105 transitions. [2024-10-14 18:15:51,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 18:15:51,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2024-10-14 18:15:51,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:15:51,150 INFO L225 Difference]: With dead ends: 90 [2024-10-14 18:15:51,150 INFO L226 Difference]: Without dead ends: 90 [2024-10-14 18:15:51,150 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-14 18:15:51,151 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 57 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 18:15:51,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 97 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 18:15:51,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-10-14 18:15:51,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 74. [2024-10-14 18:15:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.653061224489796) internal successors, (81), 69 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 18:15:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2024-10-14 18:15:51,155 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 24 [2024-10-14 18:15:51,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:15:51,155 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2024-10-14 18:15:51,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:15:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2024-10-14 18:15:51,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-14 18:15:51,156 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:15:51,156 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:15:51,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-14 18:15:51,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:15:51,365 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:15:51,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:15:51,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1394965995, now seen corresponding path program 1 times [2024-10-14 18:15:51,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:15:51,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802596018] [2024-10-14 18:15:51,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:51,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:15:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:51,444 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:15:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:51,452 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:15:51,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:15:51,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:15:51,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802596018] [2024-10-14 18:15:51,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802596018] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:15:51,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:15:51,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 18:15:51,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884579290] [2024-10-14 18:15:51,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:15:51,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 18:15:51,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:15:51,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 18:15:51,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 18:15:51,463 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:15:51,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:15:51,537 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2024-10-14 18:15:51,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 18:15:51,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2024-10-14 18:15:51,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:15:51,538 INFO L225 Difference]: With dead ends: 82 [2024-10-14 18:15:51,538 INFO L226 Difference]: Without dead ends: 82 [2024-10-14 18:15:51,538 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 18:15:51,539 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 9 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:15:51,539 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 176 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:15:51,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-10-14 18:15:51,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2024-10-14 18:15:51,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.64) internal successors, (82), 70 states have internal predecessors, (82), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 18:15:51,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2024-10-14 18:15:51,543 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 24 [2024-10-14 18:15:51,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:15:51,545 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2024-10-14 18:15:51,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:15:51,545 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2024-10-14 18:15:51,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-14 18:15:51,546 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:15:51,546 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:15:51,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-14 18:15:51,546 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:15:51,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:15:51,547 INFO L85 PathProgramCache]: Analyzing trace with hash -968235387, now seen corresponding path program 1 times [2024-10-14 18:15:51,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:15:51,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481167938] [2024-10-14 18:15:51,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:51,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:15:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:51,653 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:15:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:51,665 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:15:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 18:15:51,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:15:51,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481167938] [2024-10-14 18:15:51,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481167938] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:15:51,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811985859] [2024-10-14 18:15:51,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:51,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:15:51,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:15:51,680 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:15:51,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 18:15:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:51,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-14 18:15:51,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:15:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:15:51,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:15:51,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:15:51,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811985859] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:15:51,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:15:51,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 10 [2024-10-14 18:15:51,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132595748] [2024-10-14 18:15:51,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:15:51,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 18:15:51,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:15:51,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 18:15:51,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-10-14 18:15:51,949 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-14 18:15:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:15:52,081 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2024-10-14 18:15:52,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 18:15:52,082 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-10-14 18:15:52,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:15:52,083 INFO L225 Difference]: With dead ends: 108 [2024-10-14 18:15:52,083 INFO L226 Difference]: Without dead ends: 108 [2024-10-14 18:15:52,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-10-14 18:15:52,084 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 107 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:15:52,085 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 231 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:15:52,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-10-14 18:15:52,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 80. [2024-10-14 18:15:52,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 55 states have (on average 1.6181818181818182) internal successors, (89), 75 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 18:15:52,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2024-10-14 18:15:52,089 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 27 [2024-10-14 18:15:52,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:15:52,089 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2024-10-14 18:15:52,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-14 18:15:52,090 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2024-10-14 18:15:52,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-14 18:15:52,090 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:15:52,090 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:15:52,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 18:15:52,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:15:52,295 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:15:52,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:15:52,295 INFO L85 PathProgramCache]: Analyzing trace with hash -966817111, now seen corresponding path program 1 times [2024-10-14 18:15:52,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:15:52,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600392235] [2024-10-14 18:15:52,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:52,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:15:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:52,790 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:15:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:52,840 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:15:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:15:52,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:15:52,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600392235] [2024-10-14 18:15:52,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600392235] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:15:52,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308595208] [2024-10-14 18:15:52,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:15:52,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:15:52,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:15:52,916 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:15:52,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 18:15:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:15:53,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-10-14 18:15:53,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:15:53,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 18:15:53,161 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:15:53,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:15:53,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:15:53,259 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-14 18:15:53,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-10-14 18:15:53,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:15:53,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2024-10-14 18:15:53,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-14 18:15:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:15:53,396 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:16:01,537 INFO L349 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2024-10-14 18:16:01,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2024-10-14 18:16:01,593 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:01,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2024-10-14 18:16:01,597 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 30 treesize of output 22 [2024-10-14 18:16:01,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-14 18:16:01,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308595208] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:01,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:16:01,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 25 [2024-10-14 18:16:01,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345226856] [2024-10-14 18:16:01,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:16:01,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 18:16:01,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:16:01,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 18:16:01,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=730, Unknown=9, NotChecked=0, Total=812 [2024-10-14 18:16:01,674 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 26 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 18:16:02,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:16:02,247 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2024-10-14 18:16:02,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 18:16:02,247 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-10-14 18:16:02,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:16:02,248 INFO L225 Difference]: With dead ends: 121 [2024-10-14 18:16:02,248 INFO L226 Difference]: Without dead ends: 121 [2024-10-14 18:16:02,249 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=106, Invalid=1007, Unknown=9, NotChecked=0, Total=1122 [2024-10-14 18:16:02,252 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 95 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 18:16:02,252 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 676 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 18:16:02,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-10-14 18:16:02,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 91. [2024-10-14 18:16:02,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 66 states have (on average 1.5909090909090908) internal successors, (105), 86 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 18:16:02,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2024-10-14 18:16:02,256 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 27 [2024-10-14 18:16:02,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:16:02,257 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2024-10-14 18:16:02,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 18:16:02,257 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2024-10-14 18:16:02,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-14 18:16:02,261 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:16:02,261 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:16:02,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-14 18:16:02,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-14 18:16:02,462 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:16:02,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:16:02,463 INFO L85 PathProgramCache]: Analyzing trace with hash -966817110, now seen corresponding path program 1 times [2024-10-14 18:16:02,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:16:02,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757520444] [2024-10-14 18:16:02,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:02,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:16:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:03,221 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:16:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:03,327 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:16:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:16:03,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:16:03,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757520444] [2024-10-14 18:16:03,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757520444] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:03,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286518943] [2024-10-14 18:16:03,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:03,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:03,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:16:03,457 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:16:03,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 18:16:03,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:03,637 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-10-14 18:16:03,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:16:03,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 18:16:03,667 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 [2024-10-14 18:16:03,980 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-14 18:16:03,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-14 18:16:03,996 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:16:03,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:16:04,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:16:04,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:16:04,183 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-14 18:16:04,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-10-14 18:16:04,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-10-14 18:16:04,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:16:04,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2024-10-14 18:16:04,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:16:04,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-10-14 18:16:04,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-14 18:16:04,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-14 18:16:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:16:04,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:16:04,832 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1167 (Array Int Int)) (v_ArrVal_1166 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1166) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1167) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))) (forall ((v_ArrVal_1166 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1166) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) 4)))) is different from false [2024-10-14 18:16:04,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:04,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2024-10-14 18:16:04,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:04,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2024-10-14 18:16:04,868 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 52 treesize of output 44 [2024-10-14 18:16:04,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 70 [2024-10-14 18:16:04,882 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 9 [2024-10-14 18:16:04,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-10-14 18:16:04,892 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:04,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2024-10-14 18:16:04,899 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:04,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2024-10-14 18:16:05,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286518943] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:05,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:16:05,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2024-10-14 18:16:05,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921414966] [2024-10-14 18:16:05,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:16:05,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-14 18:16:05,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:16:05,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-14 18:16:05,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1375, Unknown=1, NotChecked=74, Total=1560 [2024-10-14 18:16:05,124 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 32 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 18:16:05,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:16:05,939 INFO L93 Difference]: Finished difference Result 128 states and 160 transitions. [2024-10-14 18:16:05,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 18:16:05,939 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2024-10-14 18:16:05,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:16:05,940 INFO L225 Difference]: With dead ends: 128 [2024-10-14 18:16:05,940 INFO L226 Difference]: Without dead ends: 128 [2024-10-14 18:16:05,941 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=153, Invalid=1742, Unknown=1, NotChecked=84, Total=1980 [2024-10-14 18:16:05,941 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 92 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-10-14 18:16:05,942 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 868 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-10-14 18:16:05,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-10-14 18:16:05,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2024-10-14 18:16:05,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.591549295774648) internal successors, (113), 91 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 18:16:05,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2024-10-14 18:16:05,945 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 27 [2024-10-14 18:16:05,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:16:05,946 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2024-10-14 18:16:05,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 18:16:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2024-10-14 18:16:05,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-10-14 18:16:05,946 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:16:05,947 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-14 18:16:05,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-14 18:16:06,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-14 18:16:06,151 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:16:06,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:16:06,152 INFO L85 PathProgramCache]: Analyzing trace with hash -481630729, now seen corresponding path program 2 times [2024-10-14 18:16:06,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:16:06,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780700001] [2024-10-14 18:16:06,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:06,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:16:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:06,230 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:16:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:06,240 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:16:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:06,248 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-10-14 18:16:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 18:16:06,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:16:06,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780700001] [2024-10-14 18:16:06,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780700001] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:06,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620795419] [2024-10-14 18:16:06,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 18:16:06,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:06,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:16:06,260 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:16:06,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 18:16:06,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 18:16:06,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 18:16:06,418 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-14 18:16:06,420 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:16:06,440 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 18:16:06,440 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 18:16:06,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620795419] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:16:06,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 18:16:06,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2024-10-14 18:16:06,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757421827] [2024-10-14 18:16:06,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:16:06,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 18:16:06,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:16:06,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 18:16:06,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 18:16:06,442 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 18:16:06,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:16:06,472 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2024-10-14 18:16:06,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 18:16:06,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-10-14 18:16:06,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:16:06,473 INFO L225 Difference]: With dead ends: 86 [2024-10-14 18:16:06,473 INFO L226 Difference]: Without dead ends: 86 [2024-10-14 18:16:06,473 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 18:16:06,474 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 0 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 18:16:06,474 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 18:16:06,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-10-14 18:16:06,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2024-10-14 18:16:06,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.619047619047619) internal successors, (102), 82 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:16:06,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2024-10-14 18:16:06,477 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 28 [2024-10-14 18:16:06,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:16:06,478 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2024-10-14 18:16:06,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 18:16:06,478 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2024-10-14 18:16:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-10-14 18:16:06,478 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:16:06,478 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:16:06,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-14 18:16:06,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:06,683 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:16:06,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:16:06,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1398121836, now seen corresponding path program 2 times [2024-10-14 18:16:06,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:16:06,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448984949] [2024-10-14 18:16:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:06,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:16:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:06,790 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:16:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:06,797 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:16:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:16:06,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:16:06,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448984949] [2024-10-14 18:16:06,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448984949] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:06,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444400396] [2024-10-14 18:16:06,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 18:16:06,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:06,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:16:06,806 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:16:06,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 18:16:06,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 18:16:06,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 18:16:06,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 18:16:06,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:16:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 18:16:07,009 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:16:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 18:16:07,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444400396] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:16:07,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:16:07,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 8 [2024-10-14 18:16:07,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481007268] [2024-10-14 18:16:07,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:16:07,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 18:16:07,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:16:07,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 18:16:07,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-14 18:16:07,055 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-14 18:16:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:16:07,190 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2024-10-14 18:16:07,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 18:16:07,191 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-10-14 18:16:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:16:07,192 INFO L225 Difference]: With dead ends: 79 [2024-10-14 18:16:07,192 INFO L226 Difference]: Without dead ends: 79 [2024-10-14 18:16:07,192 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2024-10-14 18:16:07,193 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 58 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:16:07,193 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 224 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:16:07,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-10-14 18:16:07,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2024-10-14 18:16:07,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 71 states have internal predecessors, (84), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:16:07,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2024-10-14 18:16:07,197 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 29 [2024-10-14 18:16:07,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:16:07,197 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2024-10-14 18:16:07,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-14 18:16:07,198 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2024-10-14 18:16:07,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-10-14 18:16:07,198 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:16:07,198 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:16:07,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-14 18:16:07,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-14 18:16:07,399 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:16:07,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:16:07,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2037701263, now seen corresponding path program 2 times [2024-10-14 18:16:07,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:16:07,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346475743] [2024-10-14 18:16:07,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:07,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:16:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:07,546 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:16:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:07,557 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:16:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:16:07,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:16:07,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346475743] [2024-10-14 18:16:07,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346475743] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:07,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85323419] [2024-10-14 18:16:07,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 18:16:07,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:07,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:16:07,569 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:16:07,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 18:16:07,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 18:16:07,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 18:16:07,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 18:16:07,736 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:16:07,746 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 [2024-10-14 18:16:07,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:16:07,897 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 18:16:07,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85323419] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:16:07,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 18:16:07,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2024-10-14 18:16:07,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764896366] [2024-10-14 18:16:07,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:16:07,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-14 18:16:07,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:16:07,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-14 18:16:07,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-10-14 18:16:07,899 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:16:08,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:16:08,033 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2024-10-14 18:16:08,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 18:16:08,033 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-10-14 18:16:08,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:16:08,034 INFO L225 Difference]: With dead ends: 75 [2024-10-14 18:16:08,034 INFO L226 Difference]: Without dead ends: 75 [2024-10-14 18:16:08,034 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-10-14 18:16:08,035 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 22 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:16:08,035 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 285 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:16:08,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-10-14 18:16:08,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-10-14 18:16:08,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 71 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:16:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2024-10-14 18:16:08,038 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 30 [2024-10-14 18:16:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:16:08,038 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2024-10-14 18:16:08,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:16:08,038 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2024-10-14 18:16:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-10-14 18:16:08,039 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:16:08,039 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:16:08,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-14 18:16:08,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:08,241 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:16:08,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:16:08,241 INFO L85 PathProgramCache]: Analyzing trace with hash -493195830, now seen corresponding path program 3 times [2024-10-14 18:16:08,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:16:08,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958007993] [2024-10-14 18:16:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:08,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:16:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:08,386 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:16:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:08,398 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:16:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 18:16:08,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:16:08,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958007993] [2024-10-14 18:16:08,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958007993] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:08,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132703694] [2024-10-14 18:16:08,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 18:16:08,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:08,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:16:08,411 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:16:08,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 18:16:08,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 18:16:08,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 18:16:08,610 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 18:16:08,612 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:16:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-14 18:16:08,683 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 18:16:08,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132703694] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:16:08,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 18:16:08,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2024-10-14 18:16:08,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191889969] [2024-10-14 18:16:08,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:16:08,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 18:16:08,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:16:08,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 18:16:08,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-10-14 18:16:08,685 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:16:08,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:16:08,749 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2024-10-14 18:16:08,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 18:16:08,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-10-14 18:16:08,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:16:08,750 INFO L225 Difference]: With dead ends: 73 [2024-10-14 18:16:08,750 INFO L226 Difference]: Without dead ends: 73 [2024-10-14 18:16:08,750 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-10-14 18:16:08,751 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 33 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:16:08,751 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 99 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:16:08,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-10-14 18:16:08,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2024-10-14 18:16:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 64 states have internal predecessors, (70), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:16:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2024-10-14 18:16:08,754 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 32 [2024-10-14 18:16:08,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:16:08,754 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2024-10-14 18:16:08,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:16:08,754 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2024-10-14 18:16:08,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-10-14 18:16:08,755 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:16:08,755 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:16:08,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-14 18:16:08,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:08,957 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:16:08,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:16:08,957 INFO L85 PathProgramCache]: Analyzing trace with hash -87366165, now seen corresponding path program 1 times [2024-10-14 18:16:08,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:16:08,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918384527] [2024-10-14 18:16:08,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:08,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:16:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:09,175 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:16:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:09,187 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:16:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:16:09,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:16:09,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918384527] [2024-10-14 18:16:09,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918384527] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:09,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374833131] [2024-10-14 18:16:09,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:09,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:09,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:16:09,209 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:16:09,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 18:16:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:09,407 INFO L255 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 18:16:09,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:16:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:16:09,451 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:16:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 18:16:09,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374833131] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:16:09,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:16:09,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 11 [2024-10-14 18:16:09,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986960670] [2024-10-14 18:16:09,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:16:09,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-14 18:16:09,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:16:09,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-14 18:16:09,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-10-14 18:16:09,499 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-14 18:16:09,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:16:09,694 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2024-10-14 18:16:09,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 18:16:09,695 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2024-10-14 18:16:09,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:16:09,696 INFO L225 Difference]: With dead ends: 71 [2024-10-14 18:16:09,696 INFO L226 Difference]: Without dead ends: 71 [2024-10-14 18:16:09,696 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-10-14 18:16:09,697 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 85 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:16:09,697 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 330 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:16:09,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-10-14 18:16:09,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2024-10-14 18:16:09,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 64 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:16:09,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2024-10-14 18:16:09,699 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 33 [2024-10-14 18:16:09,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:16:09,700 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2024-10-14 18:16:09,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-10-14 18:16:09,700 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2024-10-14 18:16:09,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-14 18:16:09,701 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:16:09,701 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:16:09,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-14 18:16:09,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-14 18:16:09,902 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:16:09,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:16:09,902 INFO L85 PathProgramCache]: Analyzing trace with hash 987158934, now seen corresponding path program 1 times [2024-10-14 18:16:09,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:16:09,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603392110] [2024-10-14 18:16:09,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:09,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:16:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:10,830 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:16:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:10,890 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:16:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:16:10,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:16:10,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603392110] [2024-10-14 18:16:10,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603392110] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:10,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123863331] [2024-10-14 18:16:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:10,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:10,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:16:10,975 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:16:10,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 18:16:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:11,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-10-14 18:16:11,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:16:11,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 18:16:11,336 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:16:11,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:16:11,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:16:11,446 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-14 18:16:11,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2024-10-14 18:16:11,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2024-10-14 18:16:11,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-14 18:16:11,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-10-14 18:16:11,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-10-14 18:16:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:16:11,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:16:12,140 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:12,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2024-10-14 18:16:12,154 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:12,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 63 [2024-10-14 18:16:12,160 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 25 treesize of output 21 [2024-10-14 18:16:12,272 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1976 (Array Int Int))) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1976) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))) is different from false [2024-10-14 18:16:12,286 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:12,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2024-10-14 18:16:12,289 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 33 treesize of output 25 [2024-10-14 18:16:12,293 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 6 treesize of output 4 [2024-10-14 18:16:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2024-10-14 18:16:12,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123863331] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:16:12,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:16:12,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 21] total 55 [2024-10-14 18:16:12,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386988211] [2024-10-14 18:16:12,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:16:12,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-10-14 18:16:12,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:16:12,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-10-14 18:16:12,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2669, Unknown=24, NotChecked=104, Total=2970 [2024-10-14 18:16:12,644 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 55 states, 50 states have (on average 1.66) internal successors, (83), 46 states have internal predecessors, (83), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-14 18:16:13,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:16:13,636 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2024-10-14 18:16:13,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-14 18:16:13,639 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 50 states have (on average 1.66) internal successors, (83), 46 states have internal predecessors, (83), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 35 [2024-10-14 18:16:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:16:13,640 INFO L225 Difference]: With dead ends: 68 [2024-10-14 18:16:13,640 INFO L226 Difference]: Without dead ends: 68 [2024-10-14 18:16:13,641 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=316, Invalid=4086, Unknown=24, NotChecked=130, Total=4556 [2024-10-14 18:16:13,642 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 83 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-14 18:16:13,642 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1066 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 781 Invalid, 0 Unknown, 40 Unchecked, 0.5s Time] [2024-10-14 18:16:13,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-10-14 18:16:13,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-10-14 18:16:13,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 64 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:16:13,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2024-10-14 18:16:13,646 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 35 [2024-10-14 18:16:13,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:16:13,647 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2024-10-14 18:16:13,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 50 states have (on average 1.66) internal successors, (83), 46 states have internal predecessors, (83), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-10-14 18:16:13,647 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2024-10-14 18:16:13,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-14 18:16:13,648 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:16:13,648 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:16:13,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-14 18:16:13,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-10-14 18:16:13,849 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:16:13,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:16:13,849 INFO L85 PathProgramCache]: Analyzing trace with hash 764464221, now seen corresponding path program 1 times [2024-10-14 18:16:13,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:16:13,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098650674] [2024-10-14 18:16:13,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:13,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:16:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:13,964 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:16:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:13,971 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:16:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-14 18:16:13,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:16:13,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098650674] [2024-10-14 18:16:13,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098650674] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:13,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904209504] [2024-10-14 18:16:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:13,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:13,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:16:13,980 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:16:13,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 18:16:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:14,208 INFO L255 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 18:16:14,209 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:16:14,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-14 18:16:14,232 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:16:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-14 18:16:14,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904209504] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:16:14,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:16:14,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8 [2024-10-14 18:16:14,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531441065] [2024-10-14 18:16:14,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:16:14,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 18:16:14,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:16:14,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 18:16:14,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-14 18:16:14,269 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:16:14,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:16:14,362 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2024-10-14 18:16:14,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 18:16:14,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2024-10-14 18:16:14,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:16:14,363 INFO L225 Difference]: With dead ends: 65 [2024-10-14 18:16:14,363 INFO L226 Difference]: Without dead ends: 65 [2024-10-14 18:16:14,364 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-10-14 18:16:14,364 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 20 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:16:14,364 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 151 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:16:14,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-10-14 18:16:14,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-10-14 18:16:14,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:16:14,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2024-10-14 18:16:14,368 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 38 [2024-10-14 18:16:14,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:16:14,369 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2024-10-14 18:16:14,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:16:14,369 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2024-10-14 18:16:14,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-14 18:16:14,369 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:16:14,370 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:16:14,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-14 18:16:14,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-14 18:16:14,571 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:16:14,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:16:14,571 INFO L85 PathProgramCache]: Analyzing trace with hash 764464166, now seen corresponding path program 1 times [2024-10-14 18:16:14,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:16:14,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825859757] [2024-10-14 18:16:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:14,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:16:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:15,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:16:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:15,265 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:16:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:15,341 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 18:16:15,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:16:15,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825859757] [2024-10-14 18:16:15,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825859757] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:15,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279678120] [2024-10-14 18:16:15,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:15,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:15,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:16:15,344 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:16:15,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 18:16:15,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:15,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-10-14 18:16:15,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:16:15,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 18:16:15,675 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:16:15,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:16:15,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:16:15,780 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-14 18:16:15,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-10-14 18:16:15,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:16:15,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2024-10-14 18:16:15,927 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-14 18:16:15,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-10-14 18:16:15,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-14 18:16:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 18:16:15,998 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:16:24,374 INFO L349 Elim1Store]: treesize reduction 5, result has 86.8 percent of original size [2024-10-14 18:16:24,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2024-10-14 18:16:24,389 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2251 Int) (v_ArrVal_2249 (Array Int Int)) (v_ArrVal_2252 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_42| Int)) (or (< |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_42| |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_2249))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|))) (store (store .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (store .cse1 (+ |v_ULTIMATE.start_sll_circular_update_at_~head#1.offset_42| 4) v_ArrVal_2251)) (select .cse1 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) v_ArrVal_2252))) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))) is different from false [2024-10-14 18:16:24,411 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:24,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 52 [2024-10-14 18:16:24,416 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 93 treesize of output 85 [2024-10-14 18:16:24,420 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:24,422 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 74 treesize of output 68 [2024-10-14 18:16:24,425 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:24,427 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 69 treesize of output 61 [2024-10-14 18:16:24,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-10-14 18:16:24,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279678120] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:24,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:16:24,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 29 [2024-10-14 18:16:24,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44294823] [2024-10-14 18:16:24,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:16:24,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-14 18:16:24,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:16:24,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-14 18:16:24,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1061, Unknown=82, NotChecked=68, Total=1332 [2024-10-14 18:16:24,521 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 30 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 18:16:25,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:16:25,034 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2024-10-14 18:16:25,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 18:16:25,034 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2024-10-14 18:16:25,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:16:25,035 INFO L225 Difference]: With dead ends: 64 [2024-10-14 18:16:25,035 INFO L226 Difference]: Without dead ends: 64 [2024-10-14 18:16:25,036 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=172, Invalid=1469, Unknown=85, NotChecked=80, Total=1806 [2024-10-14 18:16:25,036 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 23 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 18:16:25,037 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 694 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 18:16:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-10-14 18:16:25,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-10-14 18:16:25,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.3125) internal successors, (63), 60 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:16:25,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2024-10-14 18:16:25,039 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 38 [2024-10-14 18:16:25,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:16:25,039 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2024-10-14 18:16:25,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 18:16:25,040 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2024-10-14 18:16:25,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-10-14 18:16:25,040 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:16:25,040 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:16:25,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-14 18:16:25,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:25,245 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:16:25,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:16:25,245 INFO L85 PathProgramCache]: Analyzing trace with hash 764464167, now seen corresponding path program 1 times [2024-10-14 18:16:25,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:16:25,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774461017] [2024-10-14 18:16:25,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:25,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:16:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:26,204 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:16:26,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:26,319 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:16:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 18:16:26,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:16:26,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774461017] [2024-10-14 18:16:26,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774461017] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:26,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908492046] [2024-10-14 18:16:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:26,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:26,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:16:26,457 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:16:26,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 18:16:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:26,678 INFO L255 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-10-14 18:16:26,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:16:26,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 18:16:26,691 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 [2024-10-14 18:16:26,958 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:16:26,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:16:26,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-14 18:16:27,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:16:27,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-14 18:16:27,133 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-14 18:16:27,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-10-14 18:16:27,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-10-14 18:16:27,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:16:27,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-10-14 18:16:27,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:16:27,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2024-10-14 18:16:27,402 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-14 18:16:27,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-10-14 18:16:27,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 18 [2024-10-14 18:16:27,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-10-14 18:16:27,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-14 18:16:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 18:16:27,602 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:16:28,729 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:28,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 264 [2024-10-14 18:16:28,741 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:28,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 315 treesize of output 244 [2024-10-14 18:16:28,748 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 235 treesize of output 223 [2024-10-14 18:16:28,754 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 325 treesize of output 313 [2024-10-14 18:16:28,765 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 275 treesize of output 263 [2024-10-14 18:16:28,775 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 253 treesize of output 247 [2024-10-14 18:16:28,783 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 235 treesize of output 231 [2024-10-14 18:16:28,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 236 [2024-10-14 18:16:28,799 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 192 treesize of output 190 [2024-10-14 18:16:28,805 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 190 treesize of output 188 [2024-10-14 18:16:28,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 198 [2024-10-14 18:16:28,819 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 179 treesize of output 175 [2024-10-14 18:16:28,825 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 175 treesize of output 173 [2024-10-14 18:16:29,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908492046] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:29,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:16:29,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 37 [2024-10-14 18:16:29,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927065835] [2024-10-14 18:16:29,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:16:29,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-10-14 18:16:29,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:16:29,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-10-14 18:16:29,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2258, Unknown=14, NotChecked=0, Total=2450 [2024-10-14 18:16:29,176 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 38 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 18:16:29,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:16:29,838 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2024-10-14 18:16:29,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 18:16:29,839 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2024-10-14 18:16:29,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:16:29,839 INFO L225 Difference]: With dead ends: 63 [2024-10-14 18:16:29,839 INFO L226 Difference]: Without dead ends: 63 [2024-10-14 18:16:29,840 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=247, Invalid=2819, Unknown=14, NotChecked=0, Total=3080 [2024-10-14 18:16:29,840 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 41 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 18:16:29,840 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 867 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-14 18:16:29,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-10-14 18:16:29,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-10-14 18:16:29,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.297872340425532) internal successors, (61), 58 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:16:29,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2024-10-14 18:16:29,843 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 38 [2024-10-14 18:16:29,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:16:29,843 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2024-10-14 18:16:29,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-10-14 18:16:29,843 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2024-10-14 18:16:29,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-10-14 18:16:29,844 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:16:29,844 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:16:29,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-14 18:16:30,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:30,049 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:16:30,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:16:30,049 INFO L85 PathProgramCache]: Analyzing trace with hash -2073001121, now seen corresponding path program 1 times [2024-10-14 18:16:30,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:16:30,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596232391] [2024-10-14 18:16:30,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:30,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:16:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:30,139 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:16:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:30,146 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:16:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-14 18:16:30,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:16:30,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596232391] [2024-10-14 18:16:30,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596232391] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:30,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841590473] [2024-10-14 18:16:30,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:30,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:30,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:16:30,154 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:16:30,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 18:16:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:30,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 18:16:30,391 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:16:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-14 18:16:30,409 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:16:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-10-14 18:16:30,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841590473] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:16:30,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:16:30,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 7 [2024-10-14 18:16:30,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410618036] [2024-10-14 18:16:30,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:16:30,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 18:16:30,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:16:30,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 18:16:30,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-14 18:16:30,443 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:16:30,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:16:30,545 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2024-10-14 18:16:30,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 18:16:30,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2024-10-14 18:16:30,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:16:30,546 INFO L225 Difference]: With dead ends: 62 [2024-10-14 18:16:30,546 INFO L226 Difference]: Without dead ends: 62 [2024-10-14 18:16:30,546 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-14 18:16:30,547 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 26 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:16:30,547 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 149 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:16:30,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-10-14 18:16:30,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-10-14 18:16:30,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 58 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:16:30,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2024-10-14 18:16:30,549 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 39 [2024-10-14 18:16:30,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:16:30,550 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2024-10-14 18:16:30,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:16:30,550 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2024-10-14 18:16:30,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-10-14 18:16:30,551 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:16:30,551 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:16:30,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-14 18:16:30,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-14 18:16:30,755 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:16:30,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:16:30,755 INFO L85 PathProgramCache]: Analyzing trace with hash -2056373387, now seen corresponding path program 1 times [2024-10-14 18:16:30,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:16:30,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612610275] [2024-10-14 18:16:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:30,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:16:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:32,093 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:16:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:32,208 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:16:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 18:16:32,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:16:32,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612610275] [2024-10-14 18:16:32,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612610275] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:32,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407803114] [2024-10-14 18:16:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:32,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:32,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:16:32,337 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:16:32,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-14 18:16:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:32,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-10-14 18:16:32,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:16:32,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 18:16:32,788 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:16:32,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:16:32,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:16:32,916 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-14 18:16:32,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2024-10-14 18:16:33,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:16:33,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2024-10-14 18:16:33,184 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-14 18:16:33,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 59 [2024-10-14 18:16:33,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-10-14 18:16:33,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2024-10-14 18:16:33,482 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 33 treesize of output 21 [2024-10-14 18:16:33,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-10-14 18:16:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 18:16:33,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:16:33,820 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 76 treesize of output 56 [2024-10-14 18:16:33,835 WARN L851 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_sll_circular_update_at_~data#1| (+ |c_ULTIMATE.start_main_~len~0#1| 1)) (forall ((v_ArrVal_2674 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2674) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.offset|)) (forall ((v_ArrVal_2673 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_2673) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|))) is different from false [2024-10-14 18:16:33,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:33,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2024-10-14 18:16:33,863 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 13 treesize of output 11 [2024-10-14 18:16:34,240 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:34,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2024-10-14 18:16:34,242 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 33 treesize of output 25 [2024-10-14 18:16:34,247 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 6 treesize of output 4 [2024-10-14 18:16:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-10-14 18:16:34,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407803114] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:16:34,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:16:34,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 23] total 67 [2024-10-14 18:16:34,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787760284] [2024-10-14 18:16:34,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:16:34,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-10-14 18:16:34,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:16:34,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-10-14 18:16:34,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4073, Unknown=18, NotChecked=128, Total=4422 [2024-10-14 18:16:34,660 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 67 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 58 states have internal predecessors, (103), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-14 18:16:36,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:16:36,233 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2024-10-14 18:16:36,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-14 18:16:36,234 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 58 states have internal predecessors, (103), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2024-10-14 18:16:36,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:16:36,234 INFO L225 Difference]: With dead ends: 59 [2024-10-14 18:16:36,234 INFO L226 Difference]: Without dead ends: 59 [2024-10-14 18:16:36,236 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=390, Invalid=6567, Unknown=19, NotChecked=164, Total=7140 [2024-10-14 18:16:36,236 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 64 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-14 18:16:36,236 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 1172 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1136 Invalid, 0 Unknown, 35 Unchecked, 0.7s Time] [2024-10-14 18:16:36,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-10-14 18:16:36,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-10-14 18:16:36,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 55 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:16:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2024-10-14 18:16:36,241 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 41 [2024-10-14 18:16:36,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:16:36,241 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2024-10-14 18:16:36,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 58 states have internal predecessors, (103), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-14 18:16:36,243 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2024-10-14 18:16:36,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-14 18:16:36,244 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:16:36,244 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:16:36,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-14 18:16:36,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-14 18:16:36,445 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:16:36,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:16:36,445 INFO L85 PathProgramCache]: Analyzing trace with hash -491400038, now seen corresponding path program 1 times [2024-10-14 18:16:36,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:16:36,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087029973] [2024-10-14 18:16:36,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:36,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:16:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:36,588 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:16:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:36,594 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:16:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-14 18:16:36,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:16:36,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087029973] [2024-10-14 18:16:36,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087029973] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:16:36,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:16:36,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-14 18:16:36,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539721567] [2024-10-14 18:16:36,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:16:36,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 18:16:36,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:16:36,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 18:16:36,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-14 18:16:36,633 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:16:36,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:16:36,814 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2024-10-14 18:16:36,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 18:16:36,814 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2024-10-14 18:16:36,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:16:36,815 INFO L225 Difference]: With dead ends: 72 [2024-10-14 18:16:36,815 INFO L226 Difference]: Without dead ends: 72 [2024-10-14 18:16:36,815 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-14 18:16:36,816 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 18:16:36,816 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 171 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 18:16:36,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-10-14 18:16:36,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2024-10-14 18:16:36,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 58 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:16:36,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2024-10-14 18:16:36,821 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 43 [2024-10-14 18:16:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:16:36,821 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2024-10-14 18:16:36,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:16:36,821 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2024-10-14 18:16:36,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-14 18:16:36,821 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:16:36,821 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:16:36,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-10-14 18:16:36,822 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:16:36,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:16:36,822 INFO L85 PathProgramCache]: Analyzing trace with hash -491400037, now seen corresponding path program 1 times [2024-10-14 18:16:36,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:16:36,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066733694] [2024-10-14 18:16:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:36,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:16:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:37,059 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:16:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:37,064 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:16:37,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 18:16:37,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:16:37,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066733694] [2024-10-14 18:16:37,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066733694] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:16:37,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:16:37,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-14 18:16:37,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682403263] [2024-10-14 18:16:37,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:16:37,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 18:16:37,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:16:37,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 18:16:37,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-14 18:16:37,115 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:16:37,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:16:37,267 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2024-10-14 18:16:37,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 18:16:37,267 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2024-10-14 18:16:37,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:16:37,268 INFO L225 Difference]: With dead ends: 60 [2024-10-14 18:16:37,268 INFO L226 Difference]: Without dead ends: 60 [2024-10-14 18:16:37,268 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-14 18:16:37,269 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:16:37,269 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 198 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:16:37,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-14 18:16:37,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-10-14 18:16:37,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 56 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:16:37,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2024-10-14 18:16:37,271 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 43 [2024-10-14 18:16:37,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:16:37,272 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2024-10-14 18:16:37,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:16:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2024-10-14 18:16:37,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-10-14 18:16:37,272 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:16:37,273 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:16:37,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-10-14 18:16:37,273 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:16:37,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:16:37,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1946501890, now seen corresponding path program 1 times [2024-10-14 18:16:37,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:16:37,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144740227] [2024-10-14 18:16:37,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:37,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:16:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:37,393 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:16:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:37,399 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:16:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 18:16:37,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:16:37,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144740227] [2024-10-14 18:16:37,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144740227] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:16:37,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:16:37,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-10-14 18:16:37,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857563551] [2024-10-14 18:16:37,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:16:37,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 18:16:37,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:16:37,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 18:16:37,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-14 18:16:37,459 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:16:37,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:16:37,593 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2024-10-14 18:16:37,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 18:16:37,593 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2024-10-14 18:16:37,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:16:37,594 INFO L225 Difference]: With dead ends: 60 [2024-10-14 18:16:37,594 INFO L226 Difference]: Without dead ends: 60 [2024-10-14 18:16:37,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-14 18:16:37,595 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 18:16:37,595 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 198 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 18:16:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-14 18:16:37,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-10-14 18:16:37,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 56 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:16:37,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2024-10-14 18:16:37,598 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 44 [2024-10-14 18:16:37,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:16:37,598 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2024-10-14 18:16:37,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:16:37,599 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2024-10-14 18:16:37,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-14 18:16:37,599 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:16:37,599 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:16:37,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-10-14 18:16:37,600 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:16:37,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:16:37,600 INFO L85 PathProgramCache]: Analyzing trace with hash 211038115, now seen corresponding path program 1 times [2024-10-14 18:16:37,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:16:37,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463663755] [2024-10-14 18:16:37,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:37,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:16:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:37,759 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:16:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:37,766 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:16:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-10-14 18:16:37,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:16:37,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463663755] [2024-10-14 18:16:37,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463663755] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:37,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330996661] [2024-10-14 18:16:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:37,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:37,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:16:37,776 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:16:37,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-14 18:16:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:38,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-10-14 18:16:38,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:16:38,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 18:16:38,198 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:16:38,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:16:38,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:16:38,281 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-14 18:16:38,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2024-10-14 18:16:38,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:16:38,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2024-10-14 18:16:38,435 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-14 18:16:38,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-10-14 18:16:38,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-14 18:16:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 18:16:38,546 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:16:38,575 INFO L349 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2024-10-14 18:16:38,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2024-10-14 18:16:38,579 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3053 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_update_at_~head#1.base| v_ArrVal_3053) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) |c_ULTIMATE.start_sll_circular_update_at_~head#1.base|)) is different from false [2024-10-14 18:16:38,720 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3050 (Array Int Int))) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_3050) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))) is different from false [2024-10-14 18:16:38,727 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:38,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2024-10-14 18:16:38,732 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 33 treesize of output 25 [2024-10-14 18:16:38,734 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 6 treesize of output 4 [2024-10-14 18:16:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 6 refuted. 1 times theorem prover too weak. 9 trivial. 4 not checked. [2024-10-14 18:16:38,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330996661] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 18:16:38,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 18:16:38,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 18, 18] total 34 [2024-10-14 18:16:38,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248858746] [2024-10-14 18:16:38,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 18:16:38,972 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-14 18:16:38,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:16:38,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-14 18:16:38,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=970, Unknown=6, NotChecked=126, Total=1190 [2024-10-14 18:16:38,973 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 35 states, 31 states have (on average 3.032258064516129) internal successors, (94), 28 states have internal predecessors, (94), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-14 18:16:39,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:16:39,625 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2024-10-14 18:16:39,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-14 18:16:39,625 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 3.032258064516129) internal successors, (94), 28 states have internal predecessors, (94), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 45 [2024-10-14 18:16:39,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:16:39,626 INFO L225 Difference]: With dead ends: 66 [2024-10-14 18:16:39,626 INFO L226 Difference]: Without dead ends: 66 [2024-10-14 18:16:39,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=1661, Unknown=6, NotChecked=166, Total=1980 [2024-10-14 18:16:39,627 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-14 18:16:39,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 472 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 740 Invalid, 0 Unknown, 94 Unchecked, 0.4s Time] [2024-10-14 18:16:39,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-10-14 18:16:39,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2024-10-14 18:16:39,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.2) internal successors, (60), 56 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:16:39,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2024-10-14 18:16:39,629 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 45 [2024-10-14 18:16:39,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:16:39,630 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2024-10-14 18:16:39,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 3.032258064516129) internal successors, (94), 28 states have internal predecessors, (94), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-10-14 18:16:39,630 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2024-10-14 18:16:39,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-10-14 18:16:39,631 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:16:39,631 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:16:39,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-14 18:16:39,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:39,832 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:16:39,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:16:39,832 INFO L85 PathProgramCache]: Analyzing trace with hash 211038116, now seen corresponding path program 1 times [2024-10-14 18:16:39,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:16:39,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886229247] [2024-10-14 18:16:39,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:39,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:16:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:40,653 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:16:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:40,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:16:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:40,823 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 18:16:40,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:16:40,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886229247] [2024-10-14 18:16:40,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886229247] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:40,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479764295] [2024-10-14 18:16:40,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:40,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:40,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:16:40,825 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:16:40,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-14 18:16:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:41,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-10-14 18:16:41,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:16:41,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 18:16:41,174 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:16:41,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:16:41,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:16:41,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:16:41,343 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-14 18:16:41,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-10-14 18:16:41,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-10-14 18:16:41,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:16:41,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2024-10-14 18:16:41,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:16:41,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-10-14 18:16:41,636 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-14 18:16:41,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-10-14 18:16:41,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2024-10-14 18:16:41,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-14 18:16:41,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-10-14 18:16:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 18:16:41,882 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 18:16:43,009 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:43,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 159 treesize of output 287 [2024-10-14 18:16:50,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:16:50,383 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:50,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 139 [2024-10-14 18:16:50,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:16:50,396 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 71 treesize of output 67 [2024-10-14 18:16:50,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:50,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 138 [2024-10-14 18:16:50,414 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 194 treesize of output 166 [2024-10-14 18:16:50,422 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,426 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 34 treesize of output 30 [2024-10-14 18:16:50,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-10-14 18:16:50,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-10-14 18:16:50,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-14 18:16:50,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-14 18:16:50,444 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,452 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:50,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 72 [2024-10-14 18:16:50,457 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2024-10-14 18:16:50,464 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,469 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:50,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 114 [2024-10-14 18:16:50,473 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2024-10-14 18:16:50,480 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,483 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 19 treesize of output 15 [2024-10-14 18:16:50,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 55 [2024-10-14 18:16:50,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-14 18:16:50,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-14 18:16:50,508 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,513 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 18:16:50,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 1 [2024-10-14 18:16:50,517 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,522 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 18:16:50,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 1 [2024-10-14 18:16:50,526 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,531 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:50,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 72 [2024-10-14 18:16:50,534 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2024-10-14 18:16:50,543 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 18:16:50,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 47 [2024-10-14 18:16:50,545 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2024-10-14 18:16:50,549 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,551 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 17 treesize of output 13 [2024-10-14 18:16:50,557 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,558 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,563 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 18:16:50,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 1 [2024-10-14 18:16:50,566 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,566 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,570 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 18:16:50,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 1 [2024-10-14 18:16:50,573 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,574 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,576 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-14 18:16:50,581 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,582 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,584 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-14 18:16:50,588 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,589 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,596 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 18:16:50,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 1 [2024-10-14 18:16:50,600 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,601 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,610 INFO L349 Elim1Store]: treesize reduction 8, result has 11.1 percent of original size [2024-10-14 18:16:50,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 131 treesize of output 1 [2024-10-14 18:16:50,616 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,617 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,625 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 18:16:50,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 1 [2024-10-14 18:16:50,630 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,631 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,638 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 18:16:50,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 1 [2024-10-14 18:16:50,644 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,645 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,661 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-14 18:16:50,666 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,668 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,672 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-14 18:16:50,676 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,679 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,687 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 18:16:50,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2024-10-14 18:16:50,694 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,695 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,704 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 18:16:50,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 1 [2024-10-14 18:16:50,709 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,710 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,713 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-14 18:16:50,718 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,719 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,722 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-14 18:16:50,727 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,728 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,730 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-14 18:16:50,735 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,742 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 18:16:50,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 1 [2024-10-14 18:16:50,748 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,749 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,752 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-14 18:16:50,758 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,759 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,768 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 18:16:50,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 1 [2024-10-14 18:16:50,772 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,773 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,777 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-14 18:16:50,781 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,791 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 18:16:50,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 1 [2024-10-14 18:16:50,798 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,799 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,802 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-14 18:16:50,808 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,809 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,819 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 18:16:50,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 1 [2024-10-14 18:16:50,825 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,826 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,831 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,834 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-14 18:16:50,840 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,841 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,850 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 18:16:50,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 1 [2024-10-14 18:16:50,858 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,860 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,864 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-14 18:16:50,870 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,871 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,880 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 18:16:50,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 1 [2024-10-14 18:16:50,887 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,889 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,898 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 18:16:50,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 1 [2024-10-14 18:16:50,903 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,904 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,908 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-14 18:16:50,914 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,915 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,919 WARN L214 Elim1Store]: Array PQE input equivalent to true [2024-10-14 18:16:50,925 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,926 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-14 18:16:50,938 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 18:16:50,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 1 [2024-10-14 18:16:51,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479764295] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:51,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 18:16:51,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18] total 35 [2024-10-14 18:16:51,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760904442] [2024-10-14 18:16:51,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 18:16:51,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-10-14 18:16:51,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:16:51,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-10-14 18:16:51,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2071, Unknown=3, NotChecked=0, Total=2256 [2024-10-14 18:16:51,408 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 36 states, 33 states have (on average 2.212121212121212) internal successors, (73), 31 states have internal predecessors, (73), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 18:16:52,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:16:52,039 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2024-10-14 18:16:52,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-14 18:16:52,039 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.212121212121212) internal successors, (73), 31 states have internal predecessors, (73), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 45 [2024-10-14 18:16:52,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:16:52,040 INFO L225 Difference]: With dead ends: 61 [2024-10-14 18:16:52,040 INFO L226 Difference]: Without dead ends: 61 [2024-10-14 18:16:52,040 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=223, Invalid=2530, Unknown=3, NotChecked=0, Total=2756 [2024-10-14 18:16:52,041 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 35 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-14 18:16:52,041 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 478 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-14 18:16:52,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-10-14 18:16:52,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-10-14 18:16:52,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:16:52,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2024-10-14 18:16:52,043 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 45 [2024-10-14 18:16:52,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:16:52,043 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2024-10-14 18:16:52,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.212121212121212) internal successors, (73), 31 states have internal predecessors, (73), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-14 18:16:52,044 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2024-10-14 18:16:52,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-10-14 18:16:52,044 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:16:52,044 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:16:52,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-14 18:16:52,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:52,245 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:16:52,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:16:52,246 INFO L85 PathProgramCache]: Analyzing trace with hash -2047754410, now seen corresponding path program 1 times [2024-10-14 18:16:52,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:16:52,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935275481] [2024-10-14 18:16:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:52,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:16:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:52,395 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:16:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:52,401 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:16:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 18:16:52,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:16:52,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935275481] [2024-10-14 18:16:52,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935275481] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 18:16:52,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 18:16:52,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-14 18:16:52,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520237798] [2024-10-14 18:16:52,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 18:16:52,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 18:16:52,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 18:16:52,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 18:16:52,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-14 18:16:52,444 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 10 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:16:52,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 18:16:52,611 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2024-10-14 18:16:52,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 18:16:52,612 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2024-10-14 18:16:52,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 18:16:52,613 INFO L225 Difference]: With dead ends: 60 [2024-10-14 18:16:52,613 INFO L226 Difference]: Without dead ends: 60 [2024-10-14 18:16:52,613 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-10-14 18:16:52,613 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-14 18:16:52,614 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 162 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-14 18:16:52,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-10-14 18:16:52,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-10-14 18:16:52,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 56 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 18:16:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2024-10-14 18:16:52,618 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 46 [2024-10-14 18:16:52,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 18:16:52,619 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2024-10-14 18:16:52,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 18:16:52,619 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2024-10-14 18:16:52,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-10-14 18:16:52,620 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 18:16:52,620 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 18:16:52,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-10-14 18:16:52,621 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 25 more)] === [2024-10-14 18:16:52,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 18:16:52,621 INFO L85 PathProgramCache]: Analyzing trace with hash 944230179, now seen corresponding path program 1 times [2024-10-14 18:16:52,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 18:16:52,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055906242] [2024-10-14 18:16:52,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:52,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 18:16:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:53,260 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 18:16:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:53,364 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-10-14 18:16:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 18:16:53,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 18:16:53,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055906242] [2024-10-14 18:16:53,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055906242] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 18:16:53,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145106994] [2024-10-14 18:16:53,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 18:16:53,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 18:16:53,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 18:16:53,462 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 18:16:53,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-14 18:16:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 18:16:53,725 INFO L255 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-10-14 18:16:53,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 18:16:53,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-14 18:16:53,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-10-14 18:16:53,882 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-14 18:16:53,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-14 18:16:53,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-14 18:16:54,020 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-14 18:16:54,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-10-14 18:16:54,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 18:16:54,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2024-10-14 18:16:54,254 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-10-14 18:16:54,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-10-14 18:16:54,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-10-14 18:16:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-14 18:16:54,385 INFO L311 TraceCheckSpWp]: Computing backward predicates...