./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/prefixsum_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/verifythis/prefixsum_rec.c -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 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 07:39:49,770 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:39:49,843 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 07:39:49,847 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:39:49,848 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:39:49,879 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:39:49,880 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:39:49,880 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:39:49,881 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 07:39:49,882 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 07:39:49,882 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:39:49,883 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:39:49,883 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 07:39:49,885 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 07:39:49,886 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 07:39:49,886 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:39:49,886 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:39:49,887 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:39:49,887 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:39:49,887 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:39:49,888 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 07:39:49,888 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 07:39:49,888 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 07:39:49,889 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:39:49,889 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 07:39:49,890 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:39:49,890 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 07:39:49,890 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:39:49,891 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:39:49,891 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:39:49,891 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 07:39:49,892 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:39:49,892 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:39:49,892 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 07:39:49,892 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:39:49,893 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:39:49,893 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 07:39:49,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:39:49,894 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:39:49,894 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 07:39:49,894 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 07:39:49,895 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:39:49,895 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81bdf17d0130e934dcb31a2f76f595e947b99d6273334b7f05365a624466aeab [2024-11-09 07:39:50,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:39:50,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:39:50,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:39:50,169 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:39:50,169 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:39:50,170 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/prefixsum_rec.c [2024-11-09 07:39:51,597 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:39:51,815 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:39:51,817 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_rec.c [2024-11-09 07:39:51,828 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1d62f7ef/4d07bae60972419888cccbd987b9d67e/FLAG4d9ae70da [2024-11-09 07:39:51,848 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1d62f7ef/4d07bae60972419888cccbd987b9d67e [2024-11-09 07:39:51,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:39:51,852 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:39:51,854 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:39:51,856 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:39:51,861 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:39:51,862 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:39:51" (1/1) ... [2024-11-09 07:39:51,863 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35aab18c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:39:51, skipping insertion in model container [2024-11-09 07:39:51,863 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:39:51" (1/1) ... [2024-11-09 07:39:51,885 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:39:52,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:39:52,164 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:39:52,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:39:52,200 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:39:52,201 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:39:52 WrapperNode [2024-11-09 07:39:52,201 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:39:52,202 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:39:52,202 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:39:52,202 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:39:52,209 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:39:52" (1/1) ... [2024-11-09 07:39:52,219 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:39:52" (1/1) ... [2024-11-09 07:39:52,240 INFO L138 Inliner]: procedures = 22, calls = 38, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 83 [2024-11-09 07:39:52,240 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:39:52,241 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:39:52,241 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:39:52,241 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:39:52,255 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:39:52" (1/1) ... [2024-11-09 07:39:52,256 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:39:52" (1/1) ... [2024-11-09 07:39:52,263 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:39:52" (1/1) ... [2024-11-09 07:39:52,279 INFO L175 MemorySlicer]: Split 16 memory accesses to 2 slices as follows [2, 14]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 6 writes are split as follows [0, 6]. [2024-11-09 07:39:52,279 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:39:52" (1/1) ... [2024-11-09 07:39:52,279 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:39:52" (1/1) ... [2024-11-09 07:39:52,295 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:39:52" (1/1) ... [2024-11-09 07:39:52,300 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:39:52" (1/1) ... [2024-11-09 07:39:52,303 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:39:52" (1/1) ... [2024-11-09 07:39:52,304 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:39:52" (1/1) ... [2024-11-09 07:39:52,306 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:39:52,307 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:39:52,307 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:39:52,307 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:39:52,308 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:39:52" (1/1) ... [2024-11-09 07:39:52,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 07:39:52,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:39:52,339 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 07:39:52,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 07:39:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:39:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-09 07:39:52,380 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-09 07:39:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 07:39:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 07:39:52,380 INFO L130 BoogieDeclarations]: Found specification of procedure downsweep [2024-11-09 07:39:52,381 INFO L138 BoogieDeclarations]: Found implementation of procedure downsweep [2024-11-09 07:39:52,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 07:39:52,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 07:39:52,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 07:39:52,381 INFO L130 BoogieDeclarations]: Found specification of procedure upsweep [2024-11-09 07:39:52,381 INFO L138 BoogieDeclarations]: Found implementation of procedure upsweep [2024-11-09 07:39:52,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:39:52,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:39:52,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 07:39:52,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 07:39:52,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-11-09 07:39:52,382 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-11-09 07:39:52,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 07:39:52,468 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:39:52,471 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:39:52,862 INFO L? ?]: Removed 103 outVars from TransFormulas that were not future-live. [2024-11-09 07:39:52,862 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:39:52,878 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:39:52,879 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-09 07:39:52,879 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:39:52 BoogieIcfgContainer [2024-11-09 07:39:52,879 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:39:52,882 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:39:52,882 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:39:52,886 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:39:52,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:39:51" (1/3) ... [2024-11-09 07:39:52,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da2f243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:39:52, skipping insertion in model container [2024-11-09 07:39:52,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:39:52" (2/3) ... [2024-11-09 07:39:52,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3da2f243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:39:52, skipping insertion in model container [2024-11-09 07:39:52,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:39:52" (3/3) ... [2024-11-09 07:39:52,890 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_rec.c [2024-11-09 07:39:52,907 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:39:52,908 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-11-09 07:39:52,960 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:39:52,968 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;@2af7a3ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:39:52,968 INFO L334 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2024-11-09 07:39:52,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 92 states have internal predecessors, (102), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:39:52,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 07:39:52,977 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:39:52,978 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:39:52,978 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:39:52,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:39:52,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1272586388, now seen corresponding path program 1 times [2024-11-09 07:39:52,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:39:52,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432745114] [2024-11-09 07:39:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:39:52,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:39:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:53,157 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:39:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:53,164 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 07:39:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:53,176 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-09 07:39:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:53,183 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-09 07:39:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:39:53,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:39:53,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432745114] [2024-11-09 07:39:53,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432745114] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:39:53,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:39:53,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:39:53,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536981402] [2024-11-09 07:39:53,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:39:53,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:39:53,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:39:53,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:39:53,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:39:53,233 INFO L87 Difference]: Start difference. First operand has 107 states, 58 states have (on average 1.7586206896551724) internal successors, (102), 92 states have internal predecessors, (102), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 07:39:53,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:39:53,345 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2024-11-09 07:39:53,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:39:53,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-11-09 07:39:53,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:39:53,356 INFO L225 Difference]: With dead ends: 115 [2024-11-09 07:39:53,356 INFO L226 Difference]: Without dead ends: 113 [2024-11-09 07:39:53,358 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:39:53,362 INFO L432 NwaCegarLoop]: 105 mSDtfsCounter, 27 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:39:53,363 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 178 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:39:53,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-09 07:39:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 104. [2024-11-09 07:39:53,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 56 states have (on average 1.6785714285714286) internal successors, (94), 89 states have internal predecessors, (94), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:39:53,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2024-11-09 07:39:53,410 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 29 [2024-11-09 07:39:53,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:39:53,410 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2024-11-09 07:39:53,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-09 07:39:53,411 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2024-11-09 07:39:53,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 07:39:53,413 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:39:53,413 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:39:53,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:39:53,413 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:39:53,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:39:53,414 INFO L85 PathProgramCache]: Analyzing trace with hash 392066644, now seen corresponding path program 1 times [2024-11-09 07:39:53,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:39:53,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046171248] [2024-11-09 07:39:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:39:53,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:39:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:53,725 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:39:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:53,731 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 07:39:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:53,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-09 07:39:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:53,752 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-09 07:39:53,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:53,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:39:53,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:39:53,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046171248] [2024-11-09 07:39:53,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046171248] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:39:53,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:39:53,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:39:53,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360134373] [2024-11-09 07:39:53,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:39:53,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:39:53,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:39:53,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:39:53,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:39:53,772 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:39:53,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:39:53,961 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2024-11-09 07:39:53,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:39:53,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2024-11-09 07:39:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:39:53,964 INFO L225 Difference]: With dead ends: 110 [2024-11-09 07:39:53,966 INFO L226 Difference]: Without dead ends: 110 [2024-11-09 07:39:53,966 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:39:53,968 INFO L432 NwaCegarLoop]: 85 mSDtfsCounter, 54 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:39:53,968 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 244 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:39:53,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-09 07:39:53,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2024-11-09 07:39:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 56 states have (on average 1.625) internal successors, (91), 86 states have internal predecessors, (91), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:39:53,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2024-11-09 07:39:53,982 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 29 [2024-11-09 07:39:53,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:39:53,984 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2024-11-09 07:39:53,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:39:53,984 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2024-11-09 07:39:53,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 07:39:53,988 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:39:53,988 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:39:53,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 07:39:53,990 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:39:53,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:39:53,991 INFO L85 PathProgramCache]: Analyzing trace with hash 392066645, now seen corresponding path program 1 times [2024-11-09 07:39:53,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:39:53,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825086826] [2024-11-09 07:39:53,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:39:53,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:39:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:54,759 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:39:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:54,767 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 07:39:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:54,794 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-09 07:39:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:54,810 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-09 07:39:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:39:54,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:39:54,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825086826] [2024-11-09 07:39:54,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825086826] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:39:54,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:39:54,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-09 07:39:54,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734689717] [2024-11-09 07:39:54,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:39:54,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 07:39:54,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:39:54,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 07:39:54,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-09 07:39:54,834 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:39:55,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:39:55,488 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2024-11-09 07:39:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 07:39:55,488 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2024-11-09 07:39:55,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:39:55,490 INFO L225 Difference]: With dead ends: 135 [2024-11-09 07:39:55,490 INFO L226 Difference]: Without dead ends: 135 [2024-11-09 07:39:55,491 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2024-11-09 07:39:55,492 INFO L432 NwaCegarLoop]: 97 mSDtfsCounter, 83 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:39:55,492 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 636 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:39:55,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-09 07:39:55,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2024-11-09 07:39:55,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.578125) internal successors, (101), 94 states have internal predecessors, (101), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 07:39:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 127 transitions. [2024-11-09 07:39:55,504 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 127 transitions. Word has length 29 [2024-11-09 07:39:55,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:39:55,504 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 127 transitions. [2024-11-09 07:39:55,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:39:55,505 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 127 transitions. [2024-11-09 07:39:55,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 07:39:55,506 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:39:55,506 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:39:55,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 07:39:55,507 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:39:55,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:39:55,507 INFO L85 PathProgramCache]: Analyzing trace with hash -730835859, now seen corresponding path program 1 times [2024-11-09 07:39:55,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:39:55,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115713511] [2024-11-09 07:39:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:39:55,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:39:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:55,789 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:39:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:55,793 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 07:39:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:55,803 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-09 07:39:55,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:55,810 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-09 07:39:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:39:55,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:39:55,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115713511] [2024-11-09 07:39:55,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115713511] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:39:55,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:39:55,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 07:39:55,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276264364] [2024-11-09 07:39:55,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:39:55,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 07:39:55,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:39:55,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 07:39:55,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-09 07:39:55,820 INFO L87 Difference]: Start difference. First operand 112 states and 127 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:39:56,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:39:56,112 INFO L93 Difference]: Finished difference Result 125 states and 143 transitions. [2024-11-09 07:39:56,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:39:56,113 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2024-11-09 07:39:56,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:39:56,114 INFO L225 Difference]: With dead ends: 125 [2024-11-09 07:39:56,114 INFO L226 Difference]: Without dead ends: 125 [2024-11-09 07:39:56,115 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-09 07:39:56,116 INFO L432 NwaCegarLoop]: 91 mSDtfsCounter, 33 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:39:56,116 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 374 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:39:56,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-09 07:39:56,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2024-11-09 07:39:56,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 67 states have (on average 1.5970149253731343) internal successors, (107), 97 states have internal predecessors, (107), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 07:39:56,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2024-11-09 07:39:56,130 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 30 [2024-11-09 07:39:56,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:39:56,132 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2024-11-09 07:39:56,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-09 07:39:56,133 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2024-11-09 07:39:56,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 07:39:56,133 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:39:56,134 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:39:56,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 07:39:56,134 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:39:56,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:39:56,134 INFO L85 PathProgramCache]: Analyzing trace with hash -730835860, now seen corresponding path program 1 times [2024-11-09 07:39:56,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:39:56,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102263776] [2024-11-09 07:39:56,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:39:56,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:39:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:56,199 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:39:56,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:56,202 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 07:39:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:56,207 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-09 07:39:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:56,210 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-09 07:39:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:39:56,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:39:56,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102263776] [2024-11-09 07:39:56,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102263776] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:39:56,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:39:56,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:39:56,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920257305] [2024-11-09 07:39:56,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:39:56,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:39:56,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:39:56,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:39:56,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:39:56,216 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2024-11-09 07:39:56,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:39:56,328 INFO L93 Difference]: Finished difference Result 123 states and 140 transitions. [2024-11-09 07:39:56,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:39:56,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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 30 [2024-11-09 07:39:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:39:56,330 INFO L225 Difference]: With dead ends: 123 [2024-11-09 07:39:56,330 INFO L226 Difference]: Without dead ends: 123 [2024-11-09 07:39:56,330 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:39:56,331 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 54 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:39:56,331 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 254 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:39:56,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-09 07:39:56,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2024-11-09 07:39:56,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 67 states have (on average 1.5671641791044777) internal successors, (105), 96 states have internal predecessors, (105), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 07:39:56,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2024-11-09 07:39:56,338 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 30 [2024-11-09 07:39:56,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:39:56,339 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2024-11-09 07:39:56,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 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) [2024-11-09 07:39:56,339 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2024-11-09 07:39:56,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-09 07:39:56,340 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:39:56,340 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:39:56,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 07:39:56,340 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:39:56,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:39:56,341 INFO L85 PathProgramCache]: Analyzing trace with hash 529290709, now seen corresponding path program 1 times [2024-11-09 07:39:56,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:39:56,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220337335] [2024-11-09 07:39:56,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:39:56,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:39:56,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:56,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:39:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:56,972 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 07:39:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:56,990 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 07:39:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:57,003 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-09 07:39:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:39:57,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:39:57,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220337335] [2024-11-09 07:39:57,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220337335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:39:57,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823596153] [2024-11-09 07:39:57,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:39:57,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:39:57,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:39:57,017 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:39:57,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:39:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:57,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 07:39:57,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:39:57,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 07:39:57,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-09 07:39:57,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 07:39:57,567 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 43 treesize of output 32 [2024-11-09 07:39:57,577 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 07:39:57,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 07:39:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:39:57,899 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:39:58,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823596153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:39:58,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:39:58,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2024-11-09 07:39:58,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466892248] [2024-11-09 07:39:58,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:39:58,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 07:39:58,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:39:58,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 07:39:58,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-11-09 07:39:58,104 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-09 07:39:59,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:39:59,296 INFO L93 Difference]: Finished difference Result 123 states and 137 transitions. [2024-11-09 07:39:59,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 07:39:59,297 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 30 [2024-11-09 07:39:59,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:39:59,299 INFO L225 Difference]: With dead ends: 123 [2024-11-09 07:39:59,299 INFO L226 Difference]: Without dead ends: 123 [2024-11-09 07:39:59,300 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 07:39:59,300 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 184 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 07:39:59,303 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 568 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 07:39:59,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-11-09 07:39:59,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 102. [2024-11-09 07:39:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 87 states have internal predecessors, (92), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:39:59,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2024-11-09 07:39:59,316 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 30 [2024-11-09 07:39:59,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:39:59,317 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2024-11-09 07:39:59,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-09 07:39:59,317 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2024-11-09 07:39:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 07:39:59,318 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:39:59,318 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:39:59,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 07:39:59,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 07:39:59,519 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:39:59,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:39:59,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1141814566, now seen corresponding path program 1 times [2024-11-09 07:39:59,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:39:59,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349510804] [2024-11-09 07:39:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:39:59,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:39:59,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:59,735 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:39:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:59,740 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-09 07:39:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:59,775 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-09 07:39:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:59,780 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-09 07:39:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:39:59,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:39:59,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349510804] [2024-11-09 07:39:59,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349510804] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:39:59,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93250768] [2024-11-09 07:39:59,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:39:59,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:39:59,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:39:59,788 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:39:59,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:39:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:39:59,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 07:39:59,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:39:59,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 07:39:59,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 07:40:00,095 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 07:40:00,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-09 07:40:00,110 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 07:40:00,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 07:40:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:40:00,406 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:40:00,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93250768] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:00,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:40:00,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-11-09 07:40:00,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707610286] [2024-11-09 07:40:00,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:40:00,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 07:40:00,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:00,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 07:40:00,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2024-11-09 07:40:00,781 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-09 07:40:01,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:01,690 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2024-11-09 07:40:01,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 07:40:01,691 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 33 [2024-11-09 07:40:01,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:01,691 INFO L225 Difference]: With dead ends: 120 [2024-11-09 07:40:01,692 INFO L226 Difference]: Without dead ends: 117 [2024-11-09 07:40:01,692 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2024-11-09 07:40:01,693 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 263 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:01,693 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 479 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:40:01,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-09 07:40:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 106. [2024-11-09 07:40:01,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 91 states have internal predecessors, (96), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:40:01,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2024-11-09 07:40:01,700 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 33 [2024-11-09 07:40:01,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:01,700 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2024-11-09 07:40:01,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 7 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-09 07:40:01,700 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2024-11-09 07:40:01,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 07:40:01,701 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:01,701 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] [2024-11-09 07:40:01,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 07:40:01,902 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 [2024-11-09 07:40:01,902 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:01,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:01,903 INFO L85 PathProgramCache]: Analyzing trace with hash 826925320, now seen corresponding path program 1 times [2024-11-09 07:40:01,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:01,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534529698] [2024-11-09 07:40:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:01,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:02,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:02,214 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 07:40:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:02,226 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 07:40:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:02,232 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-09 07:40:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:02,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:02,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:02,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534529698] [2024-11-09 07:40:02,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534529698] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:02,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59087502] [2024-11-09 07:40:02,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:02,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:02,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:40:02,240 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:40:02,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:40:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:02,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 07:40:02,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:40:02,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 07:40:02,474 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-09 07:40:02,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-09 07:40:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:02,855 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:40:03,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59087502] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:03,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:40:03,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2024-11-09 07:40:03,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250897973] [2024-11-09 07:40:03,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:40:03,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 07:40:03,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:03,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 07:40:03,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-09 07:40:03,128 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 07:40:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:03,753 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2024-11-09 07:40:03,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 07:40:03,753 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 35 [2024-11-09 07:40:03,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:03,756 INFO L225 Difference]: With dead ends: 114 [2024-11-09 07:40:03,756 INFO L226 Difference]: Without dead ends: 114 [2024-11-09 07:40:03,756 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2024-11-09 07:40:03,757 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 136 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:03,757 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 511 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:40:03,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-09 07:40:03,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2024-11-09 07:40:03,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.507936507936508) internal successors, (95), 90 states have internal predecessors, (95), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:40:03,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2024-11-09 07:40:03,766 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 35 [2024-11-09 07:40:03,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:03,767 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2024-11-09 07:40:03,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-11-09 07:40:03,770 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2024-11-09 07:40:03,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-09 07:40:03,771 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:03,771 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:40:03,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 07:40:03,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:03,972 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:03,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:03,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1000164257, now seen corresponding path program 1 times [2024-11-09 07:40:03,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:03,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828114961] [2024-11-09 07:40:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:03,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:04,234 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:04,237 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 07:40:04,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:04,272 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 07:40:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:04,275 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-09 07:40:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 07:40:04,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:04,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828114961] [2024-11-09 07:40:04,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828114961] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:04,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351340544] [2024-11-09 07:40:04,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:04,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:04,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:40:04,280 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:40:04,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:40:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:04,403 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-09 07:40:04,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:40:04,669 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 0 case distinctions, treesize of input 14 treesize of output 3 [2024-11-09 07:40:04,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:40:04,813 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:40:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:40:05,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351340544] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:40:05,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:40:05,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 30 [2024-11-09 07:40:05,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181721595] [2024-11-09 07:40:05,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:40:05,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-09 07:40:05,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:05,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-09 07:40:05,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-11-09 07:40:05,159 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 07:40:05,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:05,702 INFO L93 Difference]: Finished difference Result 136 states and 153 transitions. [2024-11-09 07:40:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 07:40:05,702 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 38 [2024-11-09 07:40:05,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:05,704 INFO L225 Difference]: With dead ends: 136 [2024-11-09 07:40:05,704 INFO L226 Difference]: Without dead ends: 136 [2024-11-09 07:40:05,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 07:40:05,707 INFO L432 NwaCegarLoop]: 89 mSDtfsCounter, 51 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:05,707 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1165 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:40:05,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-09 07:40:05,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 123. [2024-11-09 07:40:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 78 states have (on average 1.4230769230769231) internal successors, (111), 105 states have internal predecessors, (111), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 07:40:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2024-11-09 07:40:05,719 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 38 [2024-11-09 07:40:05,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:05,720 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2024-11-09 07:40:05,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 07:40:05,720 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2024-11-09 07:40:05,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-09 07:40:05,721 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:05,721 INFO L215 NwaCegarLoop]: trace histogram [3, 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] [2024-11-09 07:40:05,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 07:40:05,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:05,922 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:05,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:05,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1122482977, now seen corresponding path program 2 times [2024-11-09 07:40:05,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:05,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795424178] [2024-11-09 07:40:05,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:05,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:06,332 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:06,335 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-09 07:40:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:06,349 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-09 07:40:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:06,354 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 07:40:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:40:06,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:06,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795424178] [2024-11-09 07:40:06,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795424178] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:06,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665560401] [2024-11-09 07:40:06,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 07:40:06,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:06,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:40:06,366 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:40:06,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:40:06,511 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 07:40:06,512 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:40:06,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 07:40:06,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:40:06,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 07:40:06,740 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-09 07:40:06,741 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 18 treesize of output 20 [2024-11-09 07:40:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:40:07,211 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:40:07,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665560401] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:07,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:40:07,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2024-11-09 07:40:07,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702382712] [2024-11-09 07:40:07,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:40:07,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 07:40:07,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:07,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 07:40:07,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2024-11-09 07:40:07,555 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-09 07:40:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:09,083 INFO L93 Difference]: Finished difference Result 158 states and 176 transitions. [2024-11-09 07:40:09,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 07:40:09,085 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 39 [2024-11-09 07:40:09,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:09,086 INFO L225 Difference]: With dead ends: 158 [2024-11-09 07:40:09,086 INFO L226 Difference]: Without dead ends: 158 [2024-11-09 07:40:09,087 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=269, Invalid=1801, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 07:40:09,087 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 194 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:09,087 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 1244 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 07:40:09,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-09 07:40:09,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 129. [2024-11-09 07:40:09,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 85 states have (on average 1.3764705882352941) internal successors, (117), 111 states have internal predecessors, (117), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-09 07:40:09,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 143 transitions. [2024-11-09 07:40:09,097 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 143 transitions. Word has length 39 [2024-11-09 07:40:09,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:09,097 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 143 transitions. [2024-11-09 07:40:09,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-09 07:40:09,098 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 143 transitions. [2024-11-09 07:40:09,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 07:40:09,100 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:09,100 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:40:09,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 07:40:09,301 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,SelfDestructingSolverStorable9 [2024-11-09 07:40:09,301 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:09,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:09,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1704616107, now seen corresponding path program 1 times [2024-11-09 07:40:09,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:09,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131043419] [2024-11-09 07:40:09,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:09,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:09,616 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:09,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:09,618 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 07:40:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:09,629 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 07:40:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:09,633 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-09 07:40:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:09,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:09,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131043419] [2024-11-09 07:40:09,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131043419] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:09,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969132630] [2024-11-09 07:40:09,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:09,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:09,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:40:09,639 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:40:09,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 07:40:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:09,723 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 07:40:09,725 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:40:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:10,007 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:40:10,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 65 [2024-11-09 07:40:10,710 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:10,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969132630] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:40:10,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:40:10,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-11-09 07:40:10,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188779300] [2024-11-09 07:40:10,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:40:10,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-09 07:40:10,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:10,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-09 07:40:10,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 07:40:10,713 INFO L87 Difference]: Start difference. First operand 129 states and 143 transitions. Second operand has 36 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-09 07:40:11,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:11,630 INFO L93 Difference]: Finished difference Result 192 states and 212 transitions. [2024-11-09 07:40:11,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 07:40:11,630 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2024-11-09 07:40:11,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:11,631 INFO L225 Difference]: With dead ends: 192 [2024-11-09 07:40:11,632 INFO L226 Difference]: Without dead ends: 192 [2024-11-09 07:40:11,632 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=2564, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 07:40:11,633 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 201 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:11,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 1122 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:40:11,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-09 07:40:11,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 155. [2024-11-09 07:40:11,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 104 states have (on average 1.4615384615384615) internal successors, (152), 130 states have internal predecessors, (152), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-09 07:40:11,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 188 transitions. [2024-11-09 07:40:11,638 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 188 transitions. Word has length 41 [2024-11-09 07:40:11,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:11,638 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 188 transitions. [2024-11-09 07:40:11,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 1.8125) internal successors, (58), 32 states have internal predecessors, (58), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-09 07:40:11,639 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 188 transitions. [2024-11-09 07:40:11,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 07:40:11,639 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:11,640 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:40:11,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 07:40:11,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:11,844 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting upsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:11,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:11,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1704616108, now seen corresponding path program 1 times [2024-11-09 07:40:11,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:11,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436115862] [2024-11-09 07:40:11,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:11,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:11,910 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:11,913 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 07:40:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:11,919 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 07:40:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:11,923 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-09 07:40:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 07:40:11,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:11,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436115862] [2024-11-09 07:40:11,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436115862] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:40:11,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:40:11,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 07:40:11,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434106835] [2024-11-09 07:40:11,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:40:11,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 07:40:11,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:11,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 07:40:11,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:40:11,928 INFO L87 Difference]: Start difference. First operand 155 states and 188 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:40:12,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:12,074 INFO L93 Difference]: Finished difference Result 162 states and 191 transitions. [2024-11-09 07:40:12,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 07:40:12,075 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2024-11-09 07:40:12,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:12,076 INFO L225 Difference]: With dead ends: 162 [2024-11-09 07:40:12,076 INFO L226 Difference]: Without dead ends: 162 [2024-11-09 07:40:12,076 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-09 07:40:12,077 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 68 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:12,077 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 267 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:40:12,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-11-09 07:40:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 152. [2024-11-09 07:40:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 104 states have (on average 1.3557692307692308) internal successors, (141), 127 states have internal predecessors, (141), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-09 07:40:12,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 177 transitions. [2024-11-09 07:40:12,085 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 177 transitions. Word has length 41 [2024-11-09 07:40:12,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:12,085 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 177 transitions. [2024-11-09 07:40:12,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:40:12,085 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 177 transitions. [2024-11-09 07:40:12,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-09 07:40:12,086 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:12,086 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:40:12,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 07:40:12,086 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:12,086 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:12,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1303491776, now seen corresponding path program 1 times [2024-11-09 07:40:12,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:12,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712654164] [2024-11-09 07:40:12,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:12,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:12,311 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:12,313 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 07:40:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:12,323 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 07:40:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:12,326 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-09 07:40:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:12,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:12,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712654164] [2024-11-09 07:40:12,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712654164] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:12,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255532172] [2024-11-09 07:40:12,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:12,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:12,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:40:12,331 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:40:12,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 07:40:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:12,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 07:40:12,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:40:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:12,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:40:12,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-11-09 07:40:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:12,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255532172] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:40:12,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:40:12,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2024-11-09 07:40:12,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521875805] [2024-11-09 07:40:12,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:40:12,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 07:40:12,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:12,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 07:40:12,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 07:40:12,868 INFO L87 Difference]: Start difference. First operand 152 states and 177 transitions. Second operand has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-09 07:40:13,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:13,361 INFO L93 Difference]: Finished difference Result 175 states and 198 transitions. [2024-11-09 07:40:13,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 07:40:13,361 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 42 [2024-11-09 07:40:13,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:13,362 INFO L225 Difference]: With dead ends: 175 [2024-11-09 07:40:13,362 INFO L226 Difference]: Without dead ends: 175 [2024-11-09 07:40:13,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 07:40:13,364 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 86 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:13,364 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 982 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:40:13,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-11-09 07:40:13,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 147. [2024-11-09 07:40:13,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 102 states have (on average 1.303921568627451) internal successors, (133), 123 states have internal predecessors, (133), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-09 07:40:13,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 167 transitions. [2024-11-09 07:40:13,368 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 167 transitions. Word has length 42 [2024-11-09 07:40:13,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:13,369 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 167 transitions. [2024-11-09 07:40:13,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-11-09 07:40:13,369 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 167 transitions. [2024-11-09 07:40:13,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 07:40:13,369 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:13,369 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, 1, 1, 1] [2024-11-09 07:40:13,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 07:40:13,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:13,570 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:13,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:13,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1473708635, now seen corresponding path program 1 times [2024-11-09 07:40:13,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:13,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719424872] [2024-11-09 07:40:13,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:13,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:13,669 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:13,671 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 07:40:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:13,679 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 07:40:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:13,681 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-09 07:40:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:13,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:13,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:13,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719424872] [2024-11-09 07:40:13,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719424872] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:13,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449480773] [2024-11-09 07:40:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:13,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:13,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:40:13,686 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:40:13,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 07:40:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:13,774 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 07:40:13,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:40:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:13,860 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:40:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:13,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449480773] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:40:13,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:40:13,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2024-11-09 07:40:13,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494374355] [2024-11-09 07:40:13,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:40:13,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 07:40:13,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:13,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 07:40:13,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-11-09 07:40:13,959 INFO L87 Difference]: Start difference. First operand 147 states and 167 transitions. Second operand has 18 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:40:14,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:14,181 INFO L93 Difference]: Finished difference Result 169 states and 191 transitions. [2024-11-09 07:40:14,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 07:40:14,182 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2024-11-09 07:40:14,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:14,183 INFO L225 Difference]: With dead ends: 169 [2024-11-09 07:40:14,183 INFO L226 Difference]: Without dead ends: 169 [2024-11-09 07:40:14,183 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2024-11-09 07:40:14,184 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 54 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:14,184 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 515 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:40:14,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-09 07:40:14,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 156. [2024-11-09 07:40:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 109 states have (on average 1.2844036697247707) internal successors, (140), 131 states have internal predecessors, (140), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-09 07:40:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 176 transitions. [2024-11-09 07:40:14,193 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 176 transitions. Word has length 44 [2024-11-09 07:40:14,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:14,193 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 176 transitions. [2024-11-09 07:40:14,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (9), 5 states have call predecessors, (9), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:40:14,194 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 176 transitions. [2024-11-09 07:40:14,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 07:40:14,194 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:14,195 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:40:14,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 07:40:14,395 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,SelfDestructingSolverStorable13 [2024-11-09 07:40:14,395 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:14,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:14,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1510669477, now seen corresponding path program 1 times [2024-11-09 07:40:14,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:14,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207786552] [2024-11-09 07:40:14,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:14,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:14,478 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:14,481 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 07:40:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:14,488 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 07:40:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:14,493 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-09 07:40:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:14,495 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-09 07:40:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 07:40:14,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:14,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207786552] [2024-11-09 07:40:14,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207786552] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:40:14,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:40:14,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 07:40:14,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117685146] [2024-11-09 07:40:14,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:40:14,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 07:40:14,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:14,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 07:40:14,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:40:14,511 INFO L87 Difference]: Start difference. First operand 156 states and 176 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 07:40:14,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:14,662 INFO L93 Difference]: Finished difference Result 161 states and 182 transitions. [2024-11-09 07:40:14,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 07:40:14,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2024-11-09 07:40:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:14,665 INFO L225 Difference]: With dead ends: 161 [2024-11-09 07:40:14,665 INFO L226 Difference]: Without dead ends: 161 [2024-11-09 07:40:14,665 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-09 07:40:14,666 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 66 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:14,666 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 244 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:40:14,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-09 07:40:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 151. [2024-11-09 07:40:14,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 109 states have (on average 1.238532110091743) internal successors, (135), 126 states have internal predecessors, (135), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-09 07:40:14,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 171 transitions. [2024-11-09 07:40:14,675 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 171 transitions. Word has length 50 [2024-11-09 07:40:14,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:14,676 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 171 transitions. [2024-11-09 07:40:14,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 07:40:14,676 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 171 transitions. [2024-11-09 07:40:14,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 07:40:14,677 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:14,677 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:40:14,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 07:40:14,677 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:14,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:14,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1510669478, now seen corresponding path program 1 times [2024-11-09 07:40:14,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:14,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961829548] [2024-11-09 07:40:14,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:14,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:15,000 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:15,002 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 07:40:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:15,011 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 07:40:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:15,015 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-09 07:40:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:15,017 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-09 07:40:15,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:15,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:15,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961829548] [2024-11-09 07:40:15,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961829548] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:15,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913322004] [2024-11-09 07:40:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:15,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:15,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:40:15,100 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:40:15,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 07:40:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:15,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 07:40:15,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:40:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:15,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:40:15,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2024-11-09 07:40:15,531 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:40:15,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2024-11-09 07:40:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:15,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913322004] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:40:15,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:40:15,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 32 [2024-11-09 07:40:15,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539522499] [2024-11-09 07:40:15,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:40:15,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 07:40:15,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:15,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 07:40:15,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 07:40:15,664 INFO L87 Difference]: Start difference. First operand 151 states and 171 transitions. Second operand has 33 states, 32 states have (on average 2.40625) internal successors, (77), 29 states have internal predecessors, (77), 13 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-09 07:40:16,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:16,418 INFO L93 Difference]: Finished difference Result 197 states and 226 transitions. [2024-11-09 07:40:16,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 07:40:16,418 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.40625) internal successors, (77), 29 states have internal predecessors, (77), 13 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 50 [2024-11-09 07:40:16,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:16,419 INFO L225 Difference]: With dead ends: 197 [2024-11-09 07:40:16,419 INFO L226 Difference]: Without dead ends: 197 [2024-11-09 07:40:16,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=238, Invalid=1832, Unknown=0, NotChecked=0, Total=2070 [2024-11-09 07:40:16,421 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 127 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:16,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 945 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:40:16,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-09 07:40:16,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 177. [2024-11-09 07:40:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 131 states have (on average 1.2290076335877862) internal successors, (161), 146 states have internal predecessors, (161), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-09 07:40:16,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 205 transitions. [2024-11-09 07:40:16,431 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 205 transitions. Word has length 50 [2024-11-09 07:40:16,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:16,432 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 205 transitions. [2024-11-09 07:40:16,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.40625) internal successors, (77), 29 states have internal predecessors, (77), 13 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-09 07:40:16,432 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 205 transitions. [2024-11-09 07:40:16,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 07:40:16,433 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:16,433 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:40:16,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 07:40:16,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 07:40:16,638 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting downsweepErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:16,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:16,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1687043981, now seen corresponding path program 1 times [2024-11-09 07:40:16,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:16,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346383830] [2024-11-09 07:40:16,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:16,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:16,897 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:16,899 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 07:40:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:16,911 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 07:40:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:16,914 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-09 07:40:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:16,918 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-09 07:40:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:16,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:16,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346383830] [2024-11-09 07:40:16,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346383830] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:16,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600769833] [2024-11-09 07:40:16,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:16,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:16,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:40:16,928 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:40:16,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 07:40:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:17,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 07:40:17,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:40:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:17,268 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:40:17,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-09 07:40:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:17,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600769833] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:40:17,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:40:17,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2024-11-09 07:40:17,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312942577] [2024-11-09 07:40:17,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:40:17,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 07:40:17,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:17,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 07:40:17,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2024-11-09 07:40:17,862 INFO L87 Difference]: Start difference. First operand 177 states and 205 transitions. Second operand has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 27 states have internal predecessors, (86), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-09 07:40:18,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:18,534 INFO L93 Difference]: Finished difference Result 236 states and 279 transitions. [2024-11-09 07:40:18,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 07:40:18,535 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 27 states have internal predecessors, (86), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 53 [2024-11-09 07:40:18,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:18,536 INFO L225 Difference]: With dead ends: 236 [2024-11-09 07:40:18,537 INFO L226 Difference]: Without dead ends: 236 [2024-11-09 07:40:18,537 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 07:40:18,538 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 189 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:18,538 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 860 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:40:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-09 07:40:18,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 190. [2024-11-09 07:40:18,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 142 states have (on average 1.1971830985915493) internal successors, (170), 156 states have internal predecessors, (170), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-09 07:40:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 218 transitions. [2024-11-09 07:40:18,545 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 218 transitions. Word has length 53 [2024-11-09 07:40:18,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:18,546 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 218 transitions. [2024-11-09 07:40:18,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 27 states have internal predecessors, (86), 10 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-09 07:40:18,546 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 218 transitions. [2024-11-09 07:40:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 07:40:18,547 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:18,547 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2024-11-09 07:40:18,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 07:40:18,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 07:40:18,751 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:18,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:18,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1088870373, now seen corresponding path program 2 times [2024-11-09 07:40:18,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:18,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755077658] [2024-11-09 07:40:18,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:18,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:19,220 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:19,222 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-09 07:40:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:19,242 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-09 07:40:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:19,245 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 07:40:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 07:40:19,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:19,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755077658] [2024-11-09 07:40:19,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755077658] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:19,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469837238] [2024-11-09 07:40:19,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 07:40:19,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:19,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:40:19,250 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:40:19,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 07:40:19,353 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 07:40:19,353 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:40:19,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-09 07:40:19,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:40:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:19,900 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:40:20,869 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 161 treesize of output 151 [2024-11-09 07:40:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 07:40:21,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469837238] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:40:21,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:40:21,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 17] total 52 [2024-11-09 07:40:21,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666271250] [2024-11-09 07:40:21,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:40:21,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-09 07:40:21,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:21,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-09 07:40:21,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2489, Unknown=0, NotChecked=0, Total=2756 [2024-11-09 07:40:21,579 INFO L87 Difference]: Start difference. First operand 190 states and 218 transitions. Second operand has 53 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-09 07:40:24,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:24,484 INFO L93 Difference]: Finished difference Result 260 states and 297 transitions. [2024-11-09 07:40:24,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-09 07:40:24,486 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 53 [2024-11-09 07:40:24,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:24,488 INFO L225 Difference]: With dead ends: 260 [2024-11-09 07:40:24,488 INFO L226 Difference]: Without dead ends: 260 [2024-11-09 07:40:24,491 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=855, Invalid=7887, Unknown=0, NotChecked=0, Total=8742 [2024-11-09 07:40:24,491 INFO L432 NwaCegarLoop]: 87 mSDtfsCounter, 220 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 2100 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 2221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:24,491 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 1694 Invalid, 2221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2100 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 07:40:24,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-11-09 07:40:24,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 230. [2024-11-09 07:40:24,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 172 states have (on average 1.2034883720930232) internal successors, (207), 187 states have internal predecessors, (207), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2024-11-09 07:40:24,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 269 transitions. [2024-11-09 07:40:24,504 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 269 transitions. Word has length 53 [2024-11-09 07:40:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:24,504 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 269 transitions. [2024-11-09 07:40:24,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-09 07:40:24,504 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 269 transitions. [2024-11-09 07:40:24,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-09 07:40:24,505 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:24,505 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2024-11-09 07:40:24,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 07:40:24,706 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,SelfDestructingSolverStorable17 [2024-11-09 07:40:24,706 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting upsweepErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:24,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:24,707 INFO L85 PathProgramCache]: Analyzing trace with hash -604756816, now seen corresponding path program 1 times [2024-11-09 07:40:24,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:24,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554515887] [2024-11-09 07:40:24,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:24,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:25,150 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:25,153 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-09 07:40:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:25,167 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-09 07:40:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:25,170 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 07:40:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 07:40:25,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:25,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554515887] [2024-11-09 07:40:25,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554515887] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:25,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771166083] [2024-11-09 07:40:25,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:25,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:25,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:40:25,175 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:40:25,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 07:40:25,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:25,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-09 07:40:25,276 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:40:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:25,741 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:40:26,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 73 [2024-11-09 07:40:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 07:40:26,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771166083] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:40:26,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:40:26,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 15] total 48 [2024-11-09 07:40:26,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659804175] [2024-11-09 07:40:26,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:40:26,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-09 07:40:26,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:26,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-09 07:40:26,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 07:40:26,518 INFO L87 Difference]: Start difference. First operand 230 states and 269 transitions. Second operand has 49 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 42 states have internal predecessors, (97), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-09 07:40:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:29,379 INFO L93 Difference]: Finished difference Result 316 states and 363 transitions. [2024-11-09 07:40:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-09 07:40:29,380 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 42 states have internal predecessors, (97), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 54 [2024-11-09 07:40:29,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:29,381 INFO L225 Difference]: With dead ends: 316 [2024-11-09 07:40:29,381 INFO L226 Difference]: Without dead ends: 316 [2024-11-09 07:40:29,383 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3748 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1149, Invalid=11283, Unknown=0, NotChecked=0, Total=12432 [2024-11-09 07:40:29,384 INFO L432 NwaCegarLoop]: 79 mSDtfsCounter, 327 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 2049 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 2049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:29,384 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 1464 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 2049 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 07:40:29,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-11-09 07:40:29,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 274. [2024-11-09 07:40:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 204 states have (on average 1.196078431372549) internal successors, (244), 219 states have internal predecessors, (244), 39 states have call successors, (39), 17 states have call predecessors, (39), 17 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-09 07:40:29,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 322 transitions. [2024-11-09 07:40:29,393 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 322 transitions. Word has length 54 [2024-11-09 07:40:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:29,393 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 322 transitions. [2024-11-09 07:40:29,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 42 states have internal predecessors, (97), 14 states have call successors, (15), 8 states have call predecessors, (15), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-11-09 07:40:29,394 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 322 transitions. [2024-11-09 07:40:29,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-09 07:40:29,394 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:29,394 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2024-11-09 07:40:29,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 07:40:29,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:29,595 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:29,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:29,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1351860277, now seen corresponding path program 3 times [2024-11-09 07:40:29,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:29,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062922582] [2024-11-09 07:40:29,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:29,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:29,796 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:29,798 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-09 07:40:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:29,808 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-09 07:40:29,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:29,811 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 07:40:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 07:40:29,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:29,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062922582] [2024-11-09 07:40:29,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062922582] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:29,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268194908] [2024-11-09 07:40:29,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:40:29,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:29,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:40:29,815 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:40:29,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 07:40:29,923 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 07:40:29,924 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:40:29,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-09 07:40:29,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:40:32,037 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 07:40:32,037 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:40:32,656 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 75 treesize of output 71 [2024-11-09 07:40:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 07:40:33,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268194908] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:40:33,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:40:33,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 17] total 47 [2024-11-09 07:40:33,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701189631] [2024-11-09 07:40:33,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:40:33,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-09 07:40:33,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:33,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-09 07:40:33,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 07:40:33,092 INFO L87 Difference]: Start difference. First operand 274 states and 322 transitions. Second operand has 47 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 16 states have call successors, (19), 11 states have call predecessors, (19), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 07:40:38,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:38,284 INFO L93 Difference]: Finished difference Result 382 states and 436 transitions. [2024-11-09 07:40:38,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-09 07:40:38,285 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 16 states have call successors, (19), 11 states have call predecessors, (19), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 56 [2024-11-09 07:40:38,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:38,287 INFO L225 Difference]: With dead ends: 382 [2024-11-09 07:40:38,287 INFO L226 Difference]: Without dead ends: 382 [2024-11-09 07:40:38,290 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3279 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1444, Invalid=10988, Unknown=0, NotChecked=0, Total=12432 [2024-11-09 07:40:38,291 INFO L432 NwaCegarLoop]: 77 mSDtfsCounter, 343 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:38,291 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 1319 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 07:40:38,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2024-11-09 07:40:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 331. [2024-11-09 07:40:38,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 247 states have (on average 1.1700404858299596) internal successors, (289), 262 states have internal predecessors, (289), 47 states have call successors, (47), 23 states have call predecessors, (47), 23 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2024-11-09 07:40:38,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 383 transitions. [2024-11-09 07:40:38,300 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 383 transitions. Word has length 56 [2024-11-09 07:40:38,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:38,301 INFO L471 AbstractCegarLoop]: Abstraction has 331 states and 383 transitions. [2024-11-09 07:40:38,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 16 states have call successors, (19), 11 states have call predecessors, (19), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-11-09 07:40:38,301 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 383 transitions. [2024-11-09 07:40:38,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-09 07:40:38,302 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:38,302 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:40:38,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 07:40:38,502 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,SelfDestructingSolverStorable19 [2024-11-09 07:40:38,502 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:38,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:38,503 INFO L85 PathProgramCache]: Analyzing trace with hash -453742993, now seen corresponding path program 1 times [2024-11-09 07:40:38,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:38,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426046256] [2024-11-09 07:40:38,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:38,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:38,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:38,671 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:38,674 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 07:40:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:38,682 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 07:40:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:38,686 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-09 07:40:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:38,690 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-09 07:40:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:38,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:38,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426046256] [2024-11-09 07:40:38,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426046256] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:38,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856512052] [2024-11-09 07:40:38,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:38,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:38,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:40:38,699 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:40:38,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 07:40:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:38,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 07:40:38,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:40:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:38,975 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:40:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:39,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856512052] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:40:39,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:40:39,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 30 [2024-11-09 07:40:39,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130238145] [2024-11-09 07:40:39,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:40:39,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-09 07:40:39,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:39,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-09 07:40:39,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2024-11-09 07:40:39,157 INFO L87 Difference]: Start difference. First operand 331 states and 383 transitions. Second operand has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 26 states have internal predecessors, (89), 11 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-09 07:40:39,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:39,385 INFO L93 Difference]: Finished difference Result 386 states and 443 transitions. [2024-11-09 07:40:39,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 07:40:39,386 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 26 states have internal predecessors, (89), 11 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 60 [2024-11-09 07:40:39,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:39,388 INFO L225 Difference]: With dead ends: 386 [2024-11-09 07:40:39,388 INFO L226 Difference]: Without dead ends: 386 [2024-11-09 07:40:39,388 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 07:40:39,389 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 84 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:39,389 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 992 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:40:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2024-11-09 07:40:39,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 344. [2024-11-09 07:40:39,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 258 states have (on average 1.1627906976744187) internal successors, (300), 273 states have internal predecessors, (300), 48 states have call successors, (48), 24 states have call predecessors, (48), 24 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-09 07:40:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 396 transitions. [2024-11-09 07:40:39,403 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 396 transitions. Word has length 60 [2024-11-09 07:40:39,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:39,404 INFO L471 AbstractCegarLoop]: Abstraction has 344 states and 396 transitions. [2024-11-09 07:40:39,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 26 states have internal predecessors, (89), 11 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2024-11-09 07:40:39,404 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 396 transitions. [2024-11-09 07:40:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-09 07:40:39,405 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:39,405 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:40:39,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 07:40:39,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:39,609 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:39,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:39,609 INFO L85 PathProgramCache]: Analyzing trace with hash 2073437478, now seen corresponding path program 1 times [2024-11-09 07:40:39,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:39,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157174230] [2024-11-09 07:40:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:39,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:39,663 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:39,665 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 07:40:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:39,670 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 07:40:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:39,672 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-09 07:40:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:39,680 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-09 07:40:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:39,687 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 07:40:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 07:40:39,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:39,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157174230] [2024-11-09 07:40:39,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157174230] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:40:39,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:40:39,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:40:39,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439557023] [2024-11-09 07:40:39,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:40:39,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:40:39,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:39,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:40:39,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:40:39,697 INFO L87 Difference]: Start difference. First operand 344 states and 396 transitions. Second operand has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 07:40:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:39,784 INFO L93 Difference]: Finished difference Result 384 states and 441 transitions. [2024-11-09 07:40:39,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:40:39,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 62 [2024-11-09 07:40:39,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:39,788 INFO L225 Difference]: With dead ends: 384 [2024-11-09 07:40:39,788 INFO L226 Difference]: Without dead ends: 384 [2024-11-09 07:40:39,788 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:40:39,789 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 47 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:39,790 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 214 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:40:39,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2024-11-09 07:40:39,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 343. [2024-11-09 07:40:39,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 258 states have (on average 1.1589147286821706) internal successors, (299), 272 states have internal predecessors, (299), 48 states have call successors, (48), 24 states have call predecessors, (48), 24 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-09 07:40:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 395 transitions. [2024-11-09 07:40:39,799 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 395 transitions. Word has length 62 [2024-11-09 07:40:39,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:39,799 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 395 transitions. [2024-11-09 07:40:39,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-09 07:40:39,799 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 395 transitions. [2024-11-09 07:40:39,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-09 07:40:39,800 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:39,800 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:40:39,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-09 07:40:39,801 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:39,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:39,802 INFO L85 PathProgramCache]: Analyzing trace with hash 2073437479, now seen corresponding path program 1 times [2024-11-09 07:40:39,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:39,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681718913] [2024-11-09 07:40:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:39,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:40,028 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:40,031 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 07:40:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:40,043 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 07:40:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:40,046 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-09 07:40:40,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:40,048 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-09 07:40:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:40,136 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 07:40:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:40,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:40,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681718913] [2024-11-09 07:40:40,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681718913] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:40,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039970449] [2024-11-09 07:40:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:40,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:40,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:40:40,147 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:40:40,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 07:40:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:40,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-09 07:40:40,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:40:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:40,414 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:40:40,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-09 07:40:40,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 07:40:40,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2024-11-09 07:40:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:40,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039970449] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:40:40,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:40:40,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2024-11-09 07:40:40,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825572413] [2024-11-09 07:40:40,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:40:40,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 07:40:40,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:40,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 07:40:40,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2024-11-09 07:40:40,709 INFO L87 Difference]: Start difference. First operand 343 states and 395 transitions. Second operand has 29 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 26 states have internal predecessors, (103), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-09 07:40:41,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:41,317 INFO L93 Difference]: Finished difference Result 405 states and 470 transitions. [2024-11-09 07:40:41,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-09 07:40:41,318 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 26 states have internal predecessors, (103), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) Word has length 62 [2024-11-09 07:40:41,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:41,319 INFO L225 Difference]: With dead ends: 405 [2024-11-09 07:40:41,320 INFO L226 Difference]: Without dead ends: 405 [2024-11-09 07:40:41,320 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=1921, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 07:40:41,321 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 226 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:41,321 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 635 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:40:41,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-11-09 07:40:41,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 353. [2024-11-09 07:40:41,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 268 states have (on average 1.171641791044776) internal successors, (314), 282 states have internal predecessors, (314), 48 states have call successors, (48), 24 states have call predecessors, (48), 24 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-09 07:40:41,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 410 transitions. [2024-11-09 07:40:41,336 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 410 transitions. Word has length 62 [2024-11-09 07:40:41,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:41,336 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 410 transitions. [2024-11-09 07:40:41,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.6785714285714284) internal successors, (103), 26 states have internal predecessors, (103), 9 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2024-11-09 07:40:41,337 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 410 transitions. [2024-11-09 07:40:41,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-09 07:40:41,337 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:41,338 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:40:41,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 07:40:41,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:41,539 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:41,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:41,539 INFO L85 PathProgramCache]: Analyzing trace with hash -291441920, now seen corresponding path program 1 times [2024-11-09 07:40:41,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:41,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131831236] [2024-11-09 07:40:41,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:41,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:41,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:41,676 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:41,678 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 07:40:41,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:41,684 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 07:40:41,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:41,685 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-09 07:40:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:41,687 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-09 07:40:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:41,695 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 07:40:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 07:40:41,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:41,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131831236] [2024-11-09 07:40:41,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131831236] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:41,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652170473] [2024-11-09 07:40:41,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:41,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:41,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:40:41,704 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:40:41,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 07:40:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:41,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 07:40:41,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:40:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:41,874 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:40:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:41,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652170473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:40:41,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:40:41,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-09 07:40:41,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34301275] [2024-11-09 07:40:41,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:40:41,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 07:40:41,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:41,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 07:40:41,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-11-09 07:40:41,933 INFO L87 Difference]: Start difference. First operand 353 states and 410 transitions. Second operand has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 12 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-09 07:40:42,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:42,053 INFO L93 Difference]: Finished difference Result 397 states and 455 transitions. [2024-11-09 07:40:42,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 07:40:42,054 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 12 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2024-11-09 07:40:42,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:42,055 INFO L225 Difference]: With dead ends: 397 [2024-11-09 07:40:42,055 INFO L226 Difference]: Without dead ends: 397 [2024-11-09 07:40:42,056 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-09 07:40:42,056 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 50 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:42,056 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 499 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:40:42,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2024-11-09 07:40:42,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 353. [2024-11-09 07:40:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 268 states have (on average 1.164179104477612) internal successors, (312), 282 states have internal predecessors, (312), 48 states have call successors, (48), 24 states have call predecessors, (48), 24 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-09 07:40:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 408 transitions. [2024-11-09 07:40:42,064 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 408 transitions. Word has length 64 [2024-11-09 07:40:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:42,065 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 408 transitions. [2024-11-09 07:40:42,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.461538461538462) internal successors, (71), 12 states have internal predecessors, (71), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-09 07:40:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 408 transitions. [2024-11-09 07:40:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-09 07:40:42,066 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:42,066 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:40:42,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 07:40:42,267 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,SelfDestructingSolverStorable23 [2024-11-09 07:40:42,267 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:42,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:42,267 INFO L85 PathProgramCache]: Analyzing trace with hash -443655501, now seen corresponding path program 1 times [2024-11-09 07:40:42,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:42,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734264585] [2024-11-09 07:40:42,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:42,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:43,233 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:43,235 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 07:40:43,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:43,250 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 07:40:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:43,272 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-09 07:40:43,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:43,297 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-09 07:40:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:43,493 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 07:40:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:40:44,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:44,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734264585] [2024-11-09 07:40:44,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734264585] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:44,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770809306] [2024-11-09 07:40:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:44,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:44,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:40:44,309 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:40:44,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 07:40:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:44,418 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-09 07:40:44,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:40:44,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-09 07:40:44,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2024-11-09 07:40:44,844 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 9 treesize of output 3 [2024-11-09 07:40:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 07:40:44,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:40:45,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-11-09 07:40:45,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2024-11-09 07:40:45,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-09 07:40:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:45,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770809306] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:40:45,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:40:45,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 19, 17] total 56 [2024-11-09 07:40:45,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727773154] [2024-11-09 07:40:45,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:40:45,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-09 07:40:45,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:45,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-09 07:40:45,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2857, Unknown=0, NotChecked=0, Total=3080 [2024-11-09 07:40:45,831 INFO L87 Difference]: Start difference. First operand 353 states and 408 transitions. Second operand has 56 states, 52 states have (on average 2.2884615384615383) internal successors, (119), 49 states have internal predecessors, (119), 10 states have call successors, (15), 3 states have call predecessors, (15), 7 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-09 07:40:47,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:47,925 INFO L93 Difference]: Finished difference Result 492 states and 601 transitions. [2024-11-09 07:40:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-09 07:40:47,926 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 52 states have (on average 2.2884615384615383) internal successors, (119), 49 states have internal predecessors, (119), 10 states have call successors, (15), 3 states have call predecessors, (15), 7 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) Word has length 65 [2024-11-09 07:40:47,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:47,929 INFO L225 Difference]: With dead ends: 492 [2024-11-09 07:40:47,929 INFO L226 Difference]: Without dead ends: 492 [2024-11-09 07:40:47,930 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1673 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=548, Invalid=6424, Unknown=0, NotChecked=0, Total=6972 [2024-11-09 07:40:47,931 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 130 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:47,931 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 1179 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1961 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 07:40:47,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2024-11-09 07:40:47,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 368. [2024-11-09 07:40:47,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 280 states have (on average 1.1571428571428573) internal successors, (324), 295 states have internal predecessors, (324), 49 states have call successors, (49), 24 states have call predecessors, (49), 26 states have return successors, (52), 48 states have call predecessors, (52), 49 states have call successors, (52) [2024-11-09 07:40:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 425 transitions. [2024-11-09 07:40:47,942 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 425 transitions. Word has length 65 [2024-11-09 07:40:47,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:47,942 INFO L471 AbstractCegarLoop]: Abstraction has 368 states and 425 transitions. [2024-11-09 07:40:47,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 52 states have (on average 2.2884615384615383) internal successors, (119), 49 states have internal predecessors, (119), 10 states have call successors, (15), 3 states have call predecessors, (15), 7 states have return successors, (15), 10 states have call predecessors, (15), 10 states have call successors, (15) [2024-11-09 07:40:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 425 transitions. [2024-11-09 07:40:47,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-09 07:40:47,944 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:47,944 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 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] [2024-11-09 07:40:47,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 07:40:48,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:48,145 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting upsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:48,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:48,145 INFO L85 PathProgramCache]: Analyzing trace with hash -820840534, now seen corresponding path program 4 times [2024-11-09 07:40:48,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:48,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691022681] [2024-11-09 07:40:48,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:48,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:48,423 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:48,425 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-09 07:40:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:48,435 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-09 07:40:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:48,437 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 07:40:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 07:40:48,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:48,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691022681] [2024-11-09 07:40:48,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691022681] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:48,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708469471] [2024-11-09 07:40:48,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:40:48,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:48,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:40:48,442 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:40:48,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 07:40:48,570 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:40:48,570 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:40:48,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 07:40:48,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:40:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 20 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 07:40:48,812 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:40:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 07:40:49,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708469471] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:40:49,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:40:49,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 31 [2024-11-09 07:40:49,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360017646] [2024-11-09 07:40:49,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:40:49,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 07:40:49,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:49,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 07:40:49,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2024-11-09 07:40:49,019 INFO L87 Difference]: Start difference. First operand 368 states and 425 transitions. Second operand has 31 states, 25 states have (on average 2.96) internal successors, (74), 26 states have internal predecessors, (74), 8 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:40:49,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:49,799 INFO L93 Difference]: Finished difference Result 490 states and 567 transitions. [2024-11-09 07:40:49,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-09 07:40:49,799 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 2.96) internal successors, (74), 26 states have internal predecessors, (74), 8 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 69 [2024-11-09 07:40:49,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:49,803 INFO L225 Difference]: With dead ends: 490 [2024-11-09 07:40:49,803 INFO L226 Difference]: Without dead ends: 490 [2024-11-09 07:40:49,803 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 121 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2024-11-09 07:40:49,804 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 77 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:49,804 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1145 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 07:40:49,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2024-11-09 07:40:49,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 410. [2024-11-09 07:40:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 315 states have (on average 1.1492063492063491) internal successors, (362), 332 states have internal predecessors, (362), 52 states have call successors, (52), 27 states have call predecessors, (52), 30 states have return successors, (56), 50 states have call predecessors, (56), 52 states have call successors, (56) [2024-11-09 07:40:49,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 470 transitions. [2024-11-09 07:40:49,824 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 470 transitions. Word has length 69 [2024-11-09 07:40:49,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:49,824 INFO L471 AbstractCegarLoop]: Abstraction has 410 states and 470 transitions. [2024-11-09 07:40:49,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 2.96) internal successors, (74), 26 states have internal predecessors, (74), 8 states have call successors, (13), 7 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-09 07:40:49,825 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 470 transitions. [2024-11-09 07:40:49,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-09 07:40:49,826 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:49,826 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:40:49,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 07:40:50,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:50,027 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:50,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:50,028 INFO L85 PathProgramCache]: Analyzing trace with hash -868412528, now seen corresponding path program 1 times [2024-11-09 07:40:50,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:50,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340686388] [2024-11-09 07:40:50,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:50,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:50,123 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:50,125 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 07:40:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:50,131 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 07:40:50,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:50,134 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-09 07:40:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:50,136 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-09 07:40:50,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:50,143 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 07:40:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:50,150 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 07:40:50,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:50,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340686388] [2024-11-09 07:40:50,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340686388] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:40:50,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:40:50,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 07:40:50,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869931718] [2024-11-09 07:40:50,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:40:50,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 07:40:50,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:50,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 07:40:50,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:40:50,152 INFO L87 Difference]: Start difference. First operand 410 states and 470 transitions. Second operand has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 07:40:50,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:50,257 INFO L93 Difference]: Finished difference Result 447 states and 511 transitions. [2024-11-09 07:40:50,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 07:40:50,257 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 66 [2024-11-09 07:40:50,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:50,259 INFO L225 Difference]: With dead ends: 447 [2024-11-09 07:40:50,259 INFO L226 Difference]: Without dead ends: 447 [2024-11-09 07:40:50,260 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:40:50,260 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 42 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:50,260 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 261 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:40:50,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2024-11-09 07:40:50,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 409. [2024-11-09 07:40:50,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 315 states have (on average 1.1428571428571428) internal successors, (360), 331 states have internal predecessors, (360), 52 states have call successors, (52), 27 states have call predecessors, (52), 30 states have return successors, (56), 50 states have call predecessors, (56), 52 states have call successors, (56) [2024-11-09 07:40:50,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 468 transitions. [2024-11-09 07:40:50,271 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 468 transitions. Word has length 66 [2024-11-09 07:40:50,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:50,272 INFO L471 AbstractCegarLoop]: Abstraction has 409 states and 468 transitions. [2024-11-09 07:40:50,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 07:40:50,272 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 468 transitions. [2024-11-09 07:40:50,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-09 07:40:50,273 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:50,273 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:40:50,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-09 07:40:50,273 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:50,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:50,274 INFO L85 PathProgramCache]: Analyzing trace with hash -868412527, now seen corresponding path program 1 times [2024-11-09 07:40:50,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:50,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741558400] [2024-11-09 07:40:50,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:50,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:50,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:50,497 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:50,499 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 07:40:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:50,506 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 07:40:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:50,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-09 07:40:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:50,511 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-09 07:40:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:50,516 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 07:40:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:50,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:50,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741558400] [2024-11-09 07:40:50,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741558400] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:50,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769002905] [2024-11-09 07:40:50,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:50,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:50,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:40:50,526 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:40:50,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 07:40:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:50,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 07:40:50,662 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:40:50,857 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:50,857 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:40:50,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-09 07:40:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 07:40:50,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769002905] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:40:50,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:40:50,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2024-11-09 07:40:50,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021488906] [2024-11-09 07:40:50,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:40:50,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 07:40:50,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:50,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 07:40:50,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-09 07:40:50,997 INFO L87 Difference]: Start difference. First operand 409 states and 468 transitions. Second operand has 17 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-09 07:40:51,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:51,254 INFO L93 Difference]: Finished difference Result 454 states and 516 transitions. [2024-11-09 07:40:51,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 07:40:51,254 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 66 [2024-11-09 07:40:51,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:51,256 INFO L225 Difference]: With dead ends: 454 [2024-11-09 07:40:51,256 INFO L226 Difference]: Without dead ends: 454 [2024-11-09 07:40:51,256 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 130 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2024-11-09 07:40:51,257 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 138 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:51,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 365 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:40:51,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2024-11-09 07:40:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 412. [2024-11-09 07:40:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 319 states have (on average 1.1379310344827587) internal successors, (363), 334 states have internal predecessors, (363), 52 states have call successors, (52), 27 states have call predecessors, (52), 30 states have return successors, (56), 50 states have call predecessors, (56), 52 states have call successors, (56) [2024-11-09 07:40:51,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 471 transitions. [2024-11-09 07:40:51,266 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 471 transitions. Word has length 66 [2024-11-09 07:40:51,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:51,267 INFO L471 AbstractCegarLoop]: Abstraction has 412 states and 471 transitions. [2024-11-09 07:40:51,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 6.5) internal successors, (104), 16 states have internal predecessors, (104), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-11-09 07:40:51,267 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 471 transitions. [2024-11-09 07:40:51,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-09 07:40:51,268 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:51,268 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:40:51,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 07:40:51,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:51,469 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:51,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:51,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1121437506, now seen corresponding path program 2 times [2024-11-09 07:40:51,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:51,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568062071] [2024-11-09 07:40:51,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:51,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:51,607 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:51,609 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-09 07:40:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:51,615 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-09 07:40:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:51,618 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-09 07:40:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:51,619 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-11-09 07:40:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 07:40:51,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:51,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568062071] [2024-11-09 07:40:51,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568062071] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:51,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592752802] [2024-11-09 07:40:51,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 07:40:51,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:51,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:40:51,684 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:40:51,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 07:40:51,829 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 07:40:51,830 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:40:51,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 07:40:51,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:40:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 07:40:51,892 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:40:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 07:40:52,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592752802] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:40:52,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:40:52,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 20 [2024-11-09 07:40:52,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468244790] [2024-11-09 07:40:52,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:40:52,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 07:40:52,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:40:52,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 07:40:52,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-11-09 07:40:52,138 INFO L87 Difference]: Start difference. First operand 412 states and 471 transitions. Second operand has 20 states, 20 states have (on average 4.3) internal successors, (86), 19 states have internal predecessors, (86), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 07:40:52,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:40:52,453 INFO L93 Difference]: Finished difference Result 487 states and 563 transitions. [2024-11-09 07:40:52,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 07:40:52,453 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 19 states have internal predecessors, (86), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 73 [2024-11-09 07:40:52,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:40:52,455 INFO L225 Difference]: With dead ends: 487 [2024-11-09 07:40:52,455 INFO L226 Difference]: Without dead ends: 475 [2024-11-09 07:40:52,455 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 144 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2024-11-09 07:40:52,456 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 29 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:40:52,456 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 469 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 07:40:52,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2024-11-09 07:40:52,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 368. [2024-11-09 07:40:52,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 285 states have (on average 1.1473684210526316) internal successors, (327), 296 states have internal predecessors, (327), 48 states have call successors, (48), 24 states have call predecessors, (48), 24 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2024-11-09 07:40:52,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 423 transitions. [2024-11-09 07:40:52,471 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 423 transitions. Word has length 73 [2024-11-09 07:40:52,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:40:52,471 INFO L471 AbstractCegarLoop]: Abstraction has 368 states and 423 transitions. [2024-11-09 07:40:52,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.3) internal successors, (86), 19 states have internal predecessors, (86), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-09 07:40:52,472 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 423 transitions. [2024-11-09 07:40:52,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-09 07:40:52,473 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:40:52,473 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:40:52,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-09 07:40:52,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 07:40:52,674 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [downsweepErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, downsweepErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2024-11-09 07:40:52,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:40:52,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1050620410, now seen corresponding path program 1 times [2024-11-09 07:40:52,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 07:40:52,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471892612] [2024-11-09 07:40:52,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:52,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:40:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:54,239 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-09 07:40:54,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:54,241 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-09 07:40:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:54,260 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-09 07:40:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:54,286 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-09 07:40:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:54,317 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-09 07:40:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:54,458 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-11-09 07:40:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 07:40:55,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 07:40:55,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471892612] [2024-11-09 07:40:55,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471892612] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:40:55,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649898655] [2024-11-09 07:40:55,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:40:55,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:40:55,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 07:40:55,450 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:40:55,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 07:40:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:40:55,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-09 07:40:55,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:40:55,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 07:40:55,641 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 7 treesize of output 6 [2024-11-09 07:40:55,729 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-11-09 07:40:55,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2024-11-09 07:40:55,769 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 15 treesize of output 10 [2024-11-09 07:40:55,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2024-11-09 07:40:55,864 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 11 treesize of output 10 [2024-11-09 07:40:55,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2024-11-09 07:40:55,997 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 0 case distinctions, treesize of input 25 treesize of output 14 [2024-11-09 07:40:56,164 WARN L873 $PredicateComparison]: unable to prove that (exists ((v_upsweep_~right_54 Int) (v_upsweep_~a.offset_56 Int)) (and (<= |c_upsweep_#in~right| v_upsweep_~right_54) (<= |c_upsweep_#in~a.offset| v_upsweep_~a.offset_56) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_upsweep_#in~a.base| (let ((.cse0 (+ v_upsweep_~a.offset_56 (* v_upsweep_~right_54 4)))) (store (select |c_old(#memory_int#1)| |c_upsweep_#in~a.base|) .cse0 (select (select |c_#memory_int#1| |c_upsweep_#in~a.base|) .cse0))))))) is different from true [2024-11-09 07:40:56,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2024-11-09 07:40:56,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2024-11-09 07:40:56,636 WARN L873 $PredicateComparison]: unable to prove that (exists ((downsweep_~left Int)) (and (<= downsweep_~left |c_downsweep_#in~left|) (= |c_#memory_int#1| (store |c_old(#memory_int#1)| |c_downsweep_#in~a.base| (let ((.cse2 (+ |c_downsweep_#in~a.offset| (* downsweep_~left 4)))) (store (let ((.cse1 (+ |c_downsweep_#in~a.offset| (* |c_downsweep_#in~right| 4))) (.cse0 (select |c_old(#memory_int#1)| |c_downsweep_#in~a.base|))) (store .cse0 .cse1 (+ (select .cse0 .cse1) (select .cse0 .cse2)))) .cse2 (select (select |c_#memory_int#1| |c_downsweep_#in~a.base|) .cse2))))))) is different from true [2024-11-09 07:40:56,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 90 [2024-11-09 07:40:57,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 125 [2024-11-09 07:40:57,634 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 [2024-11-09 07:40:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 07:40:57,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:41:02,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649898655] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:41:02,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:41:02,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 32] total 61 [2024-11-09 07:41:02,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44034621] [2024-11-09 07:41:02,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:41:02,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-09 07:41:02,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 07:41:02,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-09 07:41:02,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=4029, Unknown=3, NotChecked=258, Total=4556 [2024-11-09 07:41:02,407 INFO L87 Difference]: Start difference. First operand 368 states and 423 transitions. Second operand has 61 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 53 states have internal predecessors, (103), 8 states have call successors, (10), 3 states have call predecessors, (10), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10)