./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/revcpyswp2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/revcpyswp2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e5d836305a9654c4a87b407d535438bc329bb78fc0805b3b823600303a7df507 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 09:55:55,872 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 09:55:55,935 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 09:55:55,941 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 09:55:55,942 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 09:55:55,957 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 09:55:55,958 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 09:55:55,958 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 09:55:55,958 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 09:55:55,959 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 09:55:55,959 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 09:55:55,959 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 09:55:55,960 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 09:55:55,960 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 09:55:55,960 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 09:55:55,960 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 09:55:55,961 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 09:55:55,961 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 09:55:55,961 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 09:55:55,961 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 09:55:55,962 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 09:55:55,964 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 09:55:55,964 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 09:55:55,964 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 09:55:55,968 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 09:55:55,968 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 09:55:55,968 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 09:55:55,969 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 09:55:55,969 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 09:55:55,969 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 09:55:55,969 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 09:55:55,969 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 09:55:55,970 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 09:55:55,970 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 09:55:55,970 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 09:55:55,970 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 09:55:55,970 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 09:55:55,970 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 09:55:55,971 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 09:55:55,971 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 09:55:55,971 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 09:55:55,971 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 09:55:55,972 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5d836305a9654c4a87b407d535438bc329bb78fc0805b3b823600303a7df507 [2024-11-08 09:55:56,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 09:55:56,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 09:55:56,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 09:55:56,202 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 09:55:56,202 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 09:55:56,204 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/revcpyswp2.c [2024-11-08 09:55:57,406 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 09:55:57,551 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 09:55:57,552 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/revcpyswp2.c [2024-11-08 09:55:57,559 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf3f39a9c/da1f4806f4df4765ab0eccaaf7fe30b5/FLAG3b84fc60d [2024-11-08 09:55:57,972 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf3f39a9c/da1f4806f4df4765ab0eccaaf7fe30b5 [2024-11-08 09:55:57,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 09:55:57,974 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 09:55:57,975 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 09:55:57,975 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 09:55:57,983 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 09:55:57,986 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 09:55:57" (1/1) ... [2024-11-08 09:55:57,986 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29422b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:55:57, skipping insertion in model container [2024-11-08 09:55:57,986 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 09:55:57" (1/1) ... [2024-11-08 09:55:58,002 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 09:55:58,134 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/revcpyswp2.c[432,445] [2024-11-08 09:55:58,150 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 09:55:58,156 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 09:55:58,165 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/revcpyswp2.c[432,445] [2024-11-08 09:55:58,172 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 09:55:58,187 INFO L204 MainTranslator]: Completed translation [2024-11-08 09:55:58,188 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:55:58 WrapperNode [2024-11-08 09:55:58,188 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 09:55:58,189 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 09:55:58,189 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 09:55:58,189 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 09:55:58,194 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:55:58" (1/1) ... [2024-11-08 09:55:58,200 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:55:58" (1/1) ... [2024-11-08 09:55:58,216 INFO L138 Inliner]: procedures = 16, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 111 [2024-11-08 09:55:58,216 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 09:55:58,217 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 09:55:58,217 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 09:55:58,217 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 09:55:58,225 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:55:58" (1/1) ... [2024-11-08 09:55:58,225 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:55:58" (1/1) ... [2024-11-08 09:55:58,229 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:55:58" (1/1) ... [2024-11-08 09:55:58,240 INFO L175 MemorySlicer]: Split 18 memory accesses to 5 slices as follows [2, 2, 6, 5, 3]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 8 writes are split as follows [0, 1, 3, 3, 1]. [2024-11-08 09:55:58,241 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:55:58" (1/1) ... [2024-11-08 09:55:58,241 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:55:58" (1/1) ... [2024-11-08 09:55:58,248 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:55:58" (1/1) ... [2024-11-08 09:55:58,252 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:55:58" (1/1) ... [2024-11-08 09:55:58,253 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:55:58" (1/1) ... [2024-11-08 09:55:58,254 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:55:58" (1/1) ... [2024-11-08 09:55:58,255 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 09:55:58,256 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 09:55:58,256 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 09:55:58,257 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 09:55:58,257 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:55:58" (1/1) ... [2024-11-08 09:55:58,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 09:55:58,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:55:58,287 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) [2024-11-08 09:55:58,291 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 [2024-11-08 09:55:58,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 09:55:58,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 09:55:58,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 09:55:58,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 09:55:58,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 09:55:58,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-11-08 09:55:58,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 09:55:58,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 09:55:58,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 09:55:58,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 09:55:58,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-11-08 09:55:58,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 09:55:58,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 09:55:58,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 09:55:58,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 09:55:58,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 09:55:58,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 09:55:58,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 09:55:58,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-11-08 09:55:58,424 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 09:55:58,426 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 09:55:58,576 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-08 09:55:58,577 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 09:55:58,585 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 09:55:58,585 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-08 09:55:58,586 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 09:55:58 BoogieIcfgContainer [2024-11-08 09:55:58,586 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 09:55:58,587 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 09:55:58,588 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 09:55:58,590 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 09:55:58,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 09:55:57" (1/3) ... [2024-11-08 09:55:58,590 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7be2f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 09:55:58, skipping insertion in model container [2024-11-08 09:55:58,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 09:55:58" (2/3) ... [2024-11-08 09:55:58,591 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d7be2f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 09:55:58, skipping insertion in model container [2024-11-08 09:55:58,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 09:55:58" (3/3) ... [2024-11-08 09:55:58,592 INFO L112 eAbstractionObserver]: Analyzing ICFG revcpyswp2.c [2024-11-08 09:55:58,604 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 09:55:58,604 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 09:55:58,642 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 09:55:58,647 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=LoopHeads, 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;@4a6861cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 09:55:58,647 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 09:55:58,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:55:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-08 09:55:58,653 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:55:58,654 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:55:58,654 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:55:58,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:55:58,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1560213877, now seen corresponding path program 1 times [2024-11-08 09:55:58,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:55:58,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146034036] [2024-11-08 09:55:58,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:55:58,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:55:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:55:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:55:58,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:55:58,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146034036] [2024-11-08 09:55:58,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146034036] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:55:58,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:55:58,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 09:55:58,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468166717] [2024-11-08 09:55:58,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:55:58,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 09:55:58,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:55:58,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 09:55:58,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 09:55:58,884 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:55:58,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:55:58,896 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2024-11-08 09:55:58,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 09:55:58,898 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-08 09:55:58,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:55:58,904 INFO L225 Difference]: With dead ends: 47 [2024-11-08 09:55:58,904 INFO L226 Difference]: Without dead ends: 21 [2024-11-08 09:55:58,906 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 09:55:58,909 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 09:55:58,910 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 09:55:58,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-08 09:55:58,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-08 09:55:58,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:55:58,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-11-08 09:55:58,933 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2024-11-08 09:55:58,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:55:58,933 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-11-08 09:55:58,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:55:58,934 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-11-08 09:55:58,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-08 09:55:58,936 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:55:58,936 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:55:58,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 09:55:58,936 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:55:58,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:55:58,937 INFO L85 PathProgramCache]: Analyzing trace with hash 631559685, now seen corresponding path program 1 times [2024-11-08 09:55:58,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:55:58,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493315209] [2024-11-08 09:55:58,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:55:58,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:55:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:55:59,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:55:59,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:55:59,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493315209] [2024-11-08 09:55:59,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493315209] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:55:59,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:55:59,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 09:55:59,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241570096] [2024-11-08 09:55:59,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:55:59,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 09:55:59,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:55:59,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 09:55:59,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 09:55:59,076 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:55:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:55:59,122 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2024-11-08 09:55:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 09:55:59,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-11-08 09:55:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:55:59,123 INFO L225 Difference]: With dead ends: 39 [2024-11-08 09:55:59,123 INFO L226 Difference]: Without dead ends: 23 [2024-11-08 09:55:59,124 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 09:55:59,125 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 09:55:59,125 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 09:55:59,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-08 09:55:59,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2024-11-08 09:55:59,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:55:59,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-11-08 09:55:59,132 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2024-11-08 09:55:59,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:55:59,132 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-11-08 09:55:59,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:55:59,132 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-11-08 09:55:59,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-08 09:55:59,133 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:55:59,133 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:55:59,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 09:55:59,134 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:55:59,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:55:59,135 INFO L85 PathProgramCache]: Analyzing trace with hash -971977821, now seen corresponding path program 1 times [2024-11-08 09:55:59,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:55:59,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255842331] [2024-11-08 09:55:59,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:55:59,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:55:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:55:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 09:55:59,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:55:59,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255842331] [2024-11-08 09:55:59,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255842331] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 09:55:59,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 09:55:59,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 09:55:59,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019115695] [2024-11-08 09:55:59,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 09:55:59,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 09:55:59,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:55:59,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 09:55:59,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 09:55:59,278 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:55:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:55:59,340 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2024-11-08 09:55:59,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 09:55:59,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-08 09:55:59,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:55:59,341 INFO L225 Difference]: With dead ends: 48 [2024-11-08 09:55:59,341 INFO L226 Difference]: Without dead ends: 35 [2024-11-08 09:55:59,342 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 09:55:59,342 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:55:59,343 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:55:59,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-08 09:55:59,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2024-11-08 09:55:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:55:59,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-11-08 09:55:59,351 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 16 [2024-11-08 09:55:59,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:55:59,351 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-11-08 09:55:59,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:55:59,352 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-11-08 09:55:59,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-08 09:55:59,352 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:55:59,353 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:55:59,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 09:55:59,353 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:55:59,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:55:59,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1185722883, now seen corresponding path program 1 times [2024-11-08 09:55:59,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:55:59,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218012349] [2024-11-08 09:55:59,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:55:59,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:55:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:55:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 09:55:59,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:55:59,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218012349] [2024-11-08 09:55:59,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218012349] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:55:59,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640149553] [2024-11-08 09:55:59,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:55:59,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:55:59,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:55:59,480 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) [2024-11-08 09:55:59,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 09:55:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:55:59,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 09:55:59,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:55:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 09:55:59,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:55:59,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 09:55:59,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640149553] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:55:59,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:55:59,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-08 09:55:59,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342365837] [2024-11-08 09:55:59,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:55:59,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 09:55:59,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:55:59,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 09:55:59,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-08 09:55:59,660 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:55:59,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:55:59,721 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2024-11-08 09:55:59,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 09:55:59,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-08 09:55:59,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:55:59,723 INFO L225 Difference]: With dead ends: 47 [2024-11-08 09:55:59,723 INFO L226 Difference]: Without dead ends: 28 [2024-11-08 09:55:59,724 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-08 09:55:59,725 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:55:59,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:55:59,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-08 09:55:59,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2024-11-08 09:55:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:55:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-08 09:55:59,732 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 22 [2024-11-08 09:55:59,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:55:59,733 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-08 09:55:59,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:55:59,733 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-08 09:55:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-08 09:55:59,733 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:55:59,733 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:55:59,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 09:55:59,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:55:59,934 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:55:59,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:55:59,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1086929509, now seen corresponding path program 2 times [2024-11-08 09:55:59,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:55:59,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554306051] [2024-11-08 09:55:59,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:55:59,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:55:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 09:56:00,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:56:00,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554306051] [2024-11-08 09:56:00,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554306051] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:56:00,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369062176] [2024-11-08 09:56:00,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 09:56:00,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:00,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:56:00,060 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) [2024-11-08 09:56:00,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 09:56:00,140 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 09:56:00,141 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:56:00,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 09:56:00,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:56:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 09:56:00,197 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:56:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 09:56:00,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369062176] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:56:00,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:56:00,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-08 09:56:00,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912148471] [2024-11-08 09:56:00,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:56:00,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-08 09:56:00,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:56:00,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-08 09:56:00,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-08 09:56:00,232 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:00,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:56:00,331 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2024-11-08 09:56:00,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 09:56:00,333 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-08 09:56:00,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:56:00,333 INFO L225 Difference]: With dead ends: 64 [2024-11-08 09:56:00,333 INFO L226 Difference]: Without dead ends: 49 [2024-11-08 09:56:00,333 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-11-08 09:56:00,334 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:56:00,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 23 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:56:00,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-08 09:56:00,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2024-11-08 09:56:00,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:00,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-11-08 09:56:00,339 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2024-11-08 09:56:00,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:56:00,339 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-11-08 09:56:00,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:00,339 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-11-08 09:56:00,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-08 09:56:00,340 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:56:00,340 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:56:00,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 09:56:00,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:00,541 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:56:00,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:56:00,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1519365621, now seen corresponding path program 3 times [2024-11-08 09:56:00,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:56:00,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177297078] [2024-11-08 09:56:00,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:00,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:56:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:56:01,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:56:01,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177297078] [2024-11-08 09:56:01,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177297078] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:56:01,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844505161] [2024-11-08 09:56:01,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 09:56:01,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:01,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:56:01,951 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) [2024-11-08 09:56:01,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 09:56:02,043 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 09:56:02,043 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:56:02,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-08 09:56:02,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:56:02,134 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 1 [2024-11-08 09:56:02,212 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 17 treesize of output 13 [2024-11-08 09:56:02,277 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 29 treesize of output 28 [2024-11-08 09:56:02,439 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:56:02,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2024-11-08 09:56:02,443 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 17 treesize of output 13 [2024-11-08 09:56:02,496 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2024-11-08 09:56:02,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2024-11-08 09:56:02,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 09:56:02,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-08 09:56:02,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-11-08 09:56:02,687 INFO L349 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2024-11-08 09:56:02,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 21 [2024-11-08 09:56:02,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:56:02,812 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:56:02,913 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 31 treesize of output 23 [2024-11-08 09:56:02,975 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 38 treesize of output 36 [2024-11-08 09:56:02,983 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 186 treesize of output 182 [2024-11-08 09:56:03,195 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 31 treesize of output 29 [2024-11-08 09:56:03,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2024-11-08 09:56:03,389 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 35 treesize of output 33 [2024-11-08 09:56:03,392 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 48 treesize of output 46 [2024-11-08 09:56:03,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:56:03,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844505161] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:56:03,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:56:03,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 22] total 57 [2024-11-08 09:56:03,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489987002] [2024-11-08 09:56:03,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:56:03,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-08 09:56:03,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:56:03,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-08 09:56:03,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=2618, Unknown=0, NotChecked=0, Total=3192 [2024-11-08 09:56:03,573 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 57 states, 57 states have (on average 1.456140350877193) internal successors, (83), 57 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:05,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:56:05,599 INFO L93 Difference]: Finished difference Result 182 states and 206 transitions. [2024-11-08 09:56:05,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-08 09:56:05,600 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.456140350877193) internal successors, (83), 57 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-11-08 09:56:05,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:56:05,606 INFO L225 Difference]: With dead ends: 182 [2024-11-08 09:56:05,606 INFO L226 Difference]: Without dead ends: 180 [2024-11-08 09:56:05,609 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 3911 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2199, Invalid=9573, Unknown=0, NotChecked=0, Total=11772 [2024-11-08 09:56:05,609 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 633 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 09:56:05,609 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 212 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 09:56:05,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-11-08 09:56:05,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 52. [2024-11-08 09:56:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:05,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-11-08 09:56:05,618 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 30 [2024-11-08 09:56:05,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:56:05,618 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-11-08 09:56:05,619 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.456140350877193) internal successors, (83), 57 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:05,619 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-11-08 09:56:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-08 09:56:05,619 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:56:05,619 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] [2024-11-08 09:56:05,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 09:56:05,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:05,824 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:56:05,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:56:05,824 INFO L85 PathProgramCache]: Analyzing trace with hash 392313387, now seen corresponding path program 1 times [2024-11-08 09:56:05,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:56:05,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827776560] [2024-11-08 09:56:05,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:05,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:56:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:56:06,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:56:06,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827776560] [2024-11-08 09:56:06,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827776560] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:56:06,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542794844] [2024-11-08 09:56:06,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:06,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:06,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:56:06,747 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) [2024-11-08 09:56:06,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 09:56:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:06,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-08 09:56:06,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:56:06,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 09:56:07,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2024-11-08 09:56:07,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 09:56:07,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 09:56:07,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-11-08 09:56:07,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-08 09:56:07,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 09:56:07,158 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 15 [2024-11-08 09:56:07,270 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:56:07,270 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:56:07,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2024-11-08 09:56:07,363 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 46 treesize of output 42 [2024-11-08 09:56:07,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2024-11-08 09:56:07,431 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 46 treesize of output 42 [2024-11-08 09:56:07,499 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-08 09:56:07,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2024-11-08 09:56:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 09:56:07,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542794844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:56:07,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:56:07,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 13] total 45 [2024-11-08 09:56:07,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121317309] [2024-11-08 09:56:07,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:56:07,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-08 09:56:07,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:56:07,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-08 09:56:07,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1695, Unknown=0, NotChecked=0, Total=1980 [2024-11-08 09:56:07,547 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:56:08,018 INFO L93 Difference]: Finished difference Result 175 states and 200 transitions. [2024-11-08 09:56:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-08 09:56:08,019 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-08 09:56:08,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:56:08,020 INFO L225 Difference]: With dead ends: 175 [2024-11-08 09:56:08,020 INFO L226 Difference]: Without dead ends: 173 [2024-11-08 09:56:08,021 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=405, Invalid=2457, Unknown=0, NotChecked=0, Total=2862 [2024-11-08 09:56:08,022 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 182 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 09:56:08,022 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 231 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 09:56:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-08 09:56:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 63. [2024-11-08 09:56:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 62 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2024-11-08 09:56:08,035 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 34 [2024-11-08 09:56:08,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:56:08,035 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2024-11-08 09:56:08,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.066666666666667) internal successors, (93), 45 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:08,035 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2024-11-08 09:56:08,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-08 09:56:08,036 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:56:08,036 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:56:08,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 09:56:08,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:08,237 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:56:08,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:56:08,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1187349513, now seen corresponding path program 2 times [2024-11-08 09:56:08,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:56:08,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971436551] [2024-11-08 09:56:08,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:08,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:56:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 09:56:08,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:56:08,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971436551] [2024-11-08 09:56:08,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971436551] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:56:08,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890829670] [2024-11-08 09:56:08,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 09:56:08,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:08,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:56:08,365 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) [2024-11-08 09:56:08,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 09:56:08,442 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 09:56:08,443 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:56:08,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 09:56:08,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:56:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 09:56:08,500 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:56:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-08 09:56:08,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890829670] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:56:08,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:56:08,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-08 09:56:08,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619079720] [2024-11-08 09:56:08,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:56:08,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 09:56:08,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:56:08,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 09:56:08,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-08 09:56:08,549 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:08,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:56:08,672 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2024-11-08 09:56:08,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 09:56:08,672 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-08 09:56:08,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:56:08,673 INFO L225 Difference]: With dead ends: 172 [2024-11-08 09:56:08,673 INFO L226 Difference]: Without dead ends: 93 [2024-11-08 09:56:08,673 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-11-08 09:56:08,673 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:56:08,674 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 62 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:56:08,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-08 09:56:08,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2024-11-08 09:56:08,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 67 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2024-11-08 09:56:08,688 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 36 [2024-11-08 09:56:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:56:08,688 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2024-11-08 09:56:08,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:08,688 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2024-11-08 09:56:08,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-08 09:56:08,689 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:56:08,689 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:56:08,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 09:56:08,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:08,890 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:56:08,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:56:08,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1457142469, now seen corresponding path program 3 times [2024-11-08 09:56:08,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:56:08,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050327911] [2024-11-08 09:56:08,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:08,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:56:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-08 09:56:09,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:56:09,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050327911] [2024-11-08 09:56:09,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050327911] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:56:09,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239269686] [2024-11-08 09:56:09,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 09:56:09,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:09,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:56:09,014 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) [2024-11-08 09:56:09,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 09:56:09,188 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-08 09:56:09,189 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:56:09,190 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 09:56:09,191 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:56:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-08 09:56:09,245 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:56:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-08 09:56:09,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239269686] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:56:09,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:56:09,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-08 09:56:09,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860785508] [2024-11-08 09:56:09,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:56:09,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 09:56:09,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:56:09,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 09:56:09,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-08 09:56:09,306 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:09,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:56:09,432 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2024-11-08 09:56:09,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 09:56:09,434 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-08 09:56:09,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:56:09,435 INFO L225 Difference]: With dead ends: 90 [2024-11-08 09:56:09,435 INFO L226 Difference]: Without dead ends: 78 [2024-11-08 09:56:09,435 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-08 09:56:09,436 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 129 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:56:09,436 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 66 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:56:09,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-08 09:56:09,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2024-11-08 09:56:09,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 57 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2024-11-08 09:56:09,448 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 40 [2024-11-08 09:56:09,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:56:09,449 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2024-11-08 09:56:09,449 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:09,449 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2024-11-08 09:56:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-08 09:56:09,450 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:56:09,450 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:56:09,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 09:56:09,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:09,651 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:56:09,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:56:09,651 INFO L85 PathProgramCache]: Analyzing trace with hash -2009086429, now seen corresponding path program 4 times [2024-11-08 09:56:09,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:56:09,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624269832] [2024-11-08 09:56:09,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:09,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:56:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:56:11,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:56:11,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624269832] [2024-11-08 09:56:11,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624269832] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:56:11,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986255549] [2024-11-08 09:56:11,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 09:56:11,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:11,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:56:11,399 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) [2024-11-08 09:56:11,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 09:56:11,597 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 09:56:11,597 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:56:11,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-08 09:56:11,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:56:11,642 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 22 treesize of output 18 [2024-11-08 09:56:11,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2024-11-08 09:56:11,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 09:56:11,767 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:56:11,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 43 [2024-11-08 09:56:11,805 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:56:11,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2024-11-08 09:56:11,817 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 22 treesize of output 18 [2024-11-08 09:56:11,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2024-11-08 09:56:11,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2024-11-08 09:56:11,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2024-11-08 09:56:11,938 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 22 treesize of output 18 [2024-11-08 09:56:11,969 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 15 [2024-11-08 09:56:11,977 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-08 09:56:11,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 22 [2024-11-08 09:56:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 09:56:12,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:56:12,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2024-11-08 09:56:12,269 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 40 treesize of output 38 [2024-11-08 09:56:12,271 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 90 treesize of output 86 [2024-11-08 09:56:12,374 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 41 treesize of output 39 [2024-11-08 09:56:12,376 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 90 treesize of output 86 [2024-11-08 09:56:12,465 INFO L349 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2024-11-08 09:56:12,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 31 [2024-11-08 09:56:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 09:56:12,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986255549] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:56:12,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:56:12,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17, 19] total 55 [2024-11-08 09:56:12,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710586955] [2024-11-08 09:56:12,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:56:12,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-08 09:56:12,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:56:12,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-08 09:56:12,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2667, Unknown=0, NotChecked=0, Total=2970 [2024-11-08 09:56:12,517 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 55 states, 55 states have (on average 1.8181818181818181) internal successors, (100), 55 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:56:13,659 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2024-11-08 09:56:13,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-08 09:56:13,660 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.8181818181818181) internal successors, (100), 55 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-08 09:56:13,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:56:13,660 INFO L225 Difference]: With dead ends: 78 [2024-11-08 09:56:13,660 INFO L226 Difference]: Without dead ends: 76 [2024-11-08 09:56:13,662 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1929 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=875, Invalid=5767, Unknown=0, NotChecked=0, Total=6642 [2024-11-08 09:56:13,662 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 207 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 09:56:13,662 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 163 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 09:56:13,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-08 09:56:13,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2024-11-08 09:56:13,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 63 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:13,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2024-11-08 09:56:13,671 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 42 [2024-11-08 09:56:13,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:56:13,671 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2024-11-08 09:56:13,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.8181818181818181) internal successors, (100), 55 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:13,672 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2024-11-08 09:56:13,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-08 09:56:13,673 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:56:13,673 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:56:13,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 09:56:13,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:13,874 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:56:13,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:56:13,874 INFO L85 PathProgramCache]: Analyzing trace with hash 152325161, now seen corresponding path program 4 times [2024-11-08 09:56:13,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:56:13,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503720412] [2024-11-08 09:56:13,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:13,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:56:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-08 09:56:14,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:56:14,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503720412] [2024-11-08 09:56:14,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503720412] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:56:14,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963519959] [2024-11-08 09:56:14,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 09:56:14,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:14,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:56:14,011 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) [2024-11-08 09:56:14,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 09:56:14,102 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 09:56:14,102 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:56:14,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 09:56:14,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:56:14,175 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-08 09:56:14,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:56:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-08 09:56:14,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963519959] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:56:14,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:56:14,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2024-11-08 09:56:14,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672300924] [2024-11-08 09:56:14,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:56:14,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-08 09:56:14,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:56:14,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-08 09:56:14,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2024-11-08 09:56:14,230 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:14,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:56:14,383 INFO L93 Difference]: Finished difference Result 182 states and 204 transitions. [2024-11-08 09:56:14,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-08 09:56:14,384 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-08 09:56:14,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:56:14,385 INFO L225 Difference]: With dead ends: 182 [2024-11-08 09:56:14,385 INFO L226 Difference]: Without dead ends: 131 [2024-11-08 09:56:14,385 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2024-11-08 09:56:14,386 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 101 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:56:14,386 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 78 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:56:14,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-11-08 09:56:14,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 108. [2024-11-08 09:56:14,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1308411214953271) internal successors, (121), 107 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:14,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2024-11-08 09:56:14,402 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 42 [2024-11-08 09:56:14,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:56:14,402 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2024-11-08 09:56:14,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:14,403 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2024-11-08 09:56:14,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-08 09:56:14,404 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:56:14,404 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:56:14,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-08 09:56:14,608 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,SelfDestructingSolverStorable10 [2024-11-08 09:56:14,609 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:56:14,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:56:14,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1104055129, now seen corresponding path program 5 times [2024-11-08 09:56:14,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:56:14,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234085402] [2024-11-08 09:56:14,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:14,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:56:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:16,281 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:56:16,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:56:16,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234085402] [2024-11-08 09:56:16,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234085402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:56:16,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012148637] [2024-11-08 09:56:16,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 09:56:16,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:16,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:56:16,283 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) [2024-11-08 09:56:16,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 09:56:32,308 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-08 09:56:32,309 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:56:32,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-08 09:56:32,321 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:56:32,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-08 09:56:32,513 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 19 treesize of output 15 [2024-11-08 09:56:32,596 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 31 treesize of output 30 [2024-11-08 09:56:32,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 09:56:32,641 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 31 treesize of output 30 [2024-11-08 09:56:32,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 09:56:32,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 09:56:32,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-11-08 09:56:32,769 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 31 treesize of output 19 [2024-11-08 09:56:32,819 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 31 treesize of output 19 [2024-11-08 09:56:32,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2024-11-08 09:56:32,871 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 19 treesize of output 15 [2024-11-08 09:56:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:56:33,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:56:33,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2024-11-08 09:56:33,193 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 46 treesize of output 42 [2024-11-08 09:56:33,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2024-11-08 09:56:33,335 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 46 treesize of output 42 [2024-11-08 09:56:33,477 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 37 treesize of output 35 [2024-11-08 09:56:33,479 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 50 treesize of output 46 [2024-11-08 09:56:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 09:56:33,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012148637] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:56:33,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:56:33,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 20] total 65 [2024-11-08 09:56:33,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304882406] [2024-11-08 09:56:33,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:56:33,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-08 09:56:33,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:56:33,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-08 09:56:33,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=3703, Unknown=0, NotChecked=0, Total=4160 [2024-11-08 09:56:33,552 INFO L87 Difference]: Start difference. First operand 108 states and 121 transitions. Second operand has 65 states, 65 states have (on average 1.8923076923076922) internal successors, (123), 65 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:34,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:56:34,788 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2024-11-08 09:56:34,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-08 09:56:34,788 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.8923076923076922) internal successors, (123), 65 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-08 09:56:34,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:56:34,789 INFO L225 Difference]: With dead ends: 141 [2024-11-08 09:56:34,789 INFO L226 Difference]: Without dead ends: 96 [2024-11-08 09:56:34,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2889 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1071, Invalid=7671, Unknown=0, NotChecked=0, Total=8742 [2024-11-08 09:56:34,791 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 217 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 09:56:34,791 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 237 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 09:56:34,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-11-08 09:56:34,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2024-11-08 09:56:34,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2024-11-08 09:56:34,802 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 46 [2024-11-08 09:56:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:56:34,802 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2024-11-08 09:56:34,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.8923076923076922) internal successors, (123), 65 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:34,803 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2024-11-08 09:56:34,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-08 09:56:34,803 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:56:34,803 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:56:34,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 09:56:35,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:35,004 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:56:35,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:56:35,004 INFO L85 PathProgramCache]: Analyzing trace with hash 443610661, now seen corresponding path program 5 times [2024-11-08 09:56:35,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:56:35,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318700003] [2024-11-08 09:56:35,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:35,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:56:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-08 09:56:35,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:56:35,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318700003] [2024-11-08 09:56:35,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318700003] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:56:35,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221493383] [2024-11-08 09:56:35,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 09:56:35,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:35,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:56:35,134 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) [2024-11-08 09:56:35,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 09:56:58,391 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-08 09:56:58,391 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:56:58,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 09:56:58,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:56:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-08 09:56:58,461 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:56:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-08 09:56:58,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221493383] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:56:58,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:56:58,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-08 09:56:58,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753718696] [2024-11-08 09:56:58,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:56:58,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 09:56:58,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:56:58,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 09:56:58,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-08 09:56:58,520 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:58,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:56:58,716 INFO L93 Difference]: Finished difference Result 104 states and 112 transitions. [2024-11-08 09:56:58,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 09:56:58,716 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-08 09:56:58,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:56:58,717 INFO L225 Difference]: With dead ends: 104 [2024-11-08 09:56:58,717 INFO L226 Difference]: Without dead ends: 88 [2024-11-08 09:56:58,717 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 83 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2024-11-08 09:56:58,718 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 93 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:56:58,718 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 93 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:56:58,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-11-08 09:56:58,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2024-11-08 09:56:58,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 69 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2024-11-08 09:56:58,726 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 46 [2024-11-08 09:56:58,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:56:58,726 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2024-11-08 09:56:58,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:56:58,726 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2024-11-08 09:56:58,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-08 09:56:58,726 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:56:58,726 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:56:58,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 09:56:58,927 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,SelfDestructingSolverStorable12 [2024-11-08 09:56:58,927 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:56:58,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:56:58,927 INFO L85 PathProgramCache]: Analyzing trace with hash -109915453, now seen corresponding path program 6 times [2024-11-08 09:56:58,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:56:58,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396244307] [2024-11-08 09:56:58,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:56:58,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:56:58,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:56:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-08 09:56:59,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:56:59,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396244307] [2024-11-08 09:56:59,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396244307] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:56:59,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690070043] [2024-11-08 09:56:59,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 09:56:59,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:56:59,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:56:59,079 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) [2024-11-08 09:56:59,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 09:56:59,985 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-08 09:56:59,985 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:56:59,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 09:56:59,989 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:57:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-08 09:57:00,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:57:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-08 09:57:00,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690070043] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:57:00,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:57:00,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-08 09:57:00,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353341456] [2024-11-08 09:57:00,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:57:00,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 09:57:00,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:57:00,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 09:57:00,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-08 09:57:00,130 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:57:00,282 INFO L93 Difference]: Finished difference Result 196 states and 213 transitions. [2024-11-08 09:57:00,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 09:57:00,282 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-08 09:57:00,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:57:00,283 INFO L225 Difference]: With dead ends: 196 [2024-11-08 09:57:00,283 INFO L226 Difference]: Without dead ends: 143 [2024-11-08 09:57:00,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2024-11-08 09:57:00,284 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 169 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 09:57:00,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 80 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 09:57:00,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-08 09:57:00,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2024-11-08 09:57:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1090909090909091) internal successors, (122), 110 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:00,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 122 transitions. [2024-11-08 09:57:00,304 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 122 transitions. Word has length 48 [2024-11-08 09:57:00,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:57:00,304 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 122 transitions. [2024-11-08 09:57:00,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:00,304 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 122 transitions. [2024-11-08 09:57:00,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-08 09:57:00,304 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:57:00,304 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:57:00,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-08 09:57:00,505 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,SelfDestructingSolverStorable13 [2024-11-08 09:57:00,505 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:57:00,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:57:00,505 INFO L85 PathProgramCache]: Analyzing trace with hash -784625793, now seen corresponding path program 7 times [2024-11-08 09:57:00,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:57:00,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157975718] [2024-11-08 09:57:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:57:00,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:57:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:57:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-08 09:57:00,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:57:00,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157975718] [2024-11-08 09:57:00,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157975718] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:57:00,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765684724] [2024-11-08 09:57:00,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 09:57:00,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:57:00,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:57:00,650 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) [2024-11-08 09:57:00,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 09:57:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:57:00,768 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 09:57:00,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:57:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-08 09:57:00,852 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:57:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-08 09:57:00,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765684724] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:57:00,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:57:00,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-08 09:57:00,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852942514] [2024-11-08 09:57:00,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:57:00,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 09:57:00,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:57:00,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 09:57:00,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-08 09:57:00,931 INFO L87 Difference]: Start difference. First operand 111 states and 122 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:01,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:57:01,276 INFO L93 Difference]: Finished difference Result 177 states and 185 transitions. [2024-11-08 09:57:01,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-08 09:57:01,277 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-08 09:57:01,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:57:01,277 INFO L225 Difference]: With dead ends: 177 [2024-11-08 09:57:01,277 INFO L226 Difference]: Without dead ends: 137 [2024-11-08 09:57:01,278 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2024-11-08 09:57:01,278 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 137 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 09:57:01,278 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 253 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 09:57:01,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-08 09:57:01,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 108. [2024-11-08 09:57:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.074766355140187) internal successors, (115), 107 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:01,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 115 transitions. [2024-11-08 09:57:01,291 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 115 transitions. Word has length 52 [2024-11-08 09:57:01,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:57:01,291 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 115 transitions. [2024-11-08 09:57:01,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 115 transitions. [2024-11-08 09:57:01,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-08 09:57:01,292 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:57:01,292 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:57:01,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-08 09:57:01,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 09:57:01,492 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:57:01,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:57:01,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1987361967, now seen corresponding path program 6 times [2024-11-08 09:57:01,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:57:01,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074964376] [2024-11-08 09:57:01,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:57:01,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:57:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:57:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:57:03,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:57:03,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074964376] [2024-11-08 09:57:03,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074964376] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:57:03,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391928411] [2024-11-08 09:57:03,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 09:57:03,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:57:03,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:57:03,269 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) [2024-11-08 09:57:03,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 09:57:03,850 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-08 09:57:03,850 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:57:03,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-08 09:57:03,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:57:03,938 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 19 treesize of output 15 [2024-11-08 09:57:03,952 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 35 treesize of output 34 [2024-11-08 09:57:04,095 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:04,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2024-11-08 09:57:04,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 09:57:04,143 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:04,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2024-11-08 09:57:04,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 09:57:04,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 09:57:04,195 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:04,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2024-11-08 09:57:04,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-08 09:57:04,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-08 09:57:04,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-08 09:57:04,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 09:57:04,386 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 15 [2024-11-08 09:57:04,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-11-08 09:57:04,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:04,471 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 31 treesize of output 15 [2024-11-08 09:57:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-08 09:57:04,704 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:57:04,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2024-11-08 09:57:04,921 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 40 treesize of output 38 [2024-11-08 09:57:04,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 182 [2024-11-08 09:57:05,129 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 40 treesize of output 38 [2024-11-08 09:57:05,132 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 90 treesize of output 86 [2024-11-08 09:57:05,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2024-11-08 09:57:05,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2024-11-08 09:57:05,452 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-08 09:57:05,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 20 [2024-11-08 09:57:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 09:57:05,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391928411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:57:05,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:57:05,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 27, 27] total 79 [2024-11-08 09:57:05,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019229054] [2024-11-08 09:57:05,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:57:05,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-11-08 09:57:05,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:57:05,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-11-08 09:57:05,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=5318, Unknown=0, NotChecked=0, Total=6162 [2024-11-08 09:57:05,536 INFO L87 Difference]: Start difference. First operand 108 states and 115 transitions. Second operand has 79 states, 79 states have (on average 1.8101265822784811) internal successors, (143), 79 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:07,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:57:07,336 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2024-11-08 09:57:07,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-08 09:57:07,337 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.8101265822784811) internal successors, (143), 79 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-11-08 09:57:07,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:57:07,337 INFO L225 Difference]: With dead ends: 127 [2024-11-08 09:57:07,338 INFO L226 Difference]: Without dead ends: 125 [2024-11-08 09:57:07,340 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4762 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1865, Invalid=11707, Unknown=0, NotChecked=0, Total=13572 [2024-11-08 09:57:07,340 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 391 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 09:57:07,340 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 256 Invalid, 1615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 09:57:07,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-08 09:57:07,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 112. [2024-11-08 09:57:07,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.063063063063063) internal successors, (118), 111 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:07,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2024-11-08 09:57:07,354 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 54 [2024-11-08 09:57:07,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:57:07,354 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2024-11-08 09:57:07,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.8101265822784811) internal successors, (143), 79 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:07,355 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2024-11-08 09:57:07,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-08 09:57:07,355 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:57:07,355 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:57:07,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-08 09:57:07,555 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,SelfDestructingSolverStorable15 [2024-11-08 09:57:07,556 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:57:07,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:57:07,556 INFO L85 PathProgramCache]: Analyzing trace with hash -760726051, now seen corresponding path program 8 times [2024-11-08 09:57:07,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:57:07,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958188565] [2024-11-08 09:57:07,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:57:07,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:57:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:57:09,083 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:57:09,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:57:09,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958188565] [2024-11-08 09:57:09,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958188565] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:57:09,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567001747] [2024-11-08 09:57:09,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 09:57:09,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:57:09,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:57:09,085 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) [2024-11-08 09:57:09,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-08 09:57:09,231 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 09:57:09,231 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:57:09,233 INFO L255 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-08 09:57:09,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:57:09,265 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 1 [2024-11-08 09:57:09,317 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 20 treesize of output 16 [2024-11-08 09:57:09,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,333 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 42 treesize of output 41 [2024-11-08 09:57:09,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,416 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:09,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 65 [2024-11-08 09:57:09,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:09,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 89 [2024-11-08 09:57:09,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,732 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:09,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 113 [2024-11-08 09:57:09,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:09,970 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:09,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 116 treesize of output 84 [2024-11-08 09:57:09,973 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 20 treesize of output 16 [2024-11-08 09:57:10,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:10,008 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 36 treesize of output 20 [2024-11-08 09:57:10,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:10,043 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 36 treesize of output 20 [2024-11-08 09:57:10,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:10,078 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 36 treesize of output 20 [2024-11-08 09:57:10,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:10,116 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 36 treesize of output 20 [2024-11-08 09:57:10,135 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 32 treesize of output 24 [2024-11-08 09:57:10,137 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 20 treesize of output 16 [2024-11-08 09:57:10,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-11-08 09:57:10,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:10,152 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 36 treesize of output 20 [2024-11-08 09:57:10,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-11-08 09:57:10,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:10,173 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 36 treesize of output 20 [2024-11-08 09:57:10,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-11-08 09:57:10,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:10,192 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 36 treesize of output 20 [2024-11-08 09:57:10,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:10,243 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 36 treesize of output 35 [2024-11-08 09:57:10,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2024-11-08 09:57:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 36 proven. 48 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 09:57:10,284 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:57:10,354 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 31 treesize of output 23 [2024-11-08 09:57:10,441 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 38 treesize of output 30 [2024-11-08 09:57:10,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2024-11-08 09:57:10,678 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 38 treesize of output 30 [2024-11-08 09:57:10,817 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 38 treesize of output 36 [2024-11-08 09:57:10,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 182 [2024-11-08 09:57:11,383 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 38 treesize of output 36 [2024-11-08 09:57:11,388 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 186 treesize of output 182 [2024-11-08 09:57:11,600 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 35 treesize of output 33 [2024-11-08 09:57:11,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2024-11-08 09:57:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-08 09:57:11,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567001747] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:57:11,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:57:11,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 28, 16] total 66 [2024-11-08 09:57:11,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235400307] [2024-11-08 09:57:11,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:57:11,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-08 09:57:11,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:57:11,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-08 09:57:11,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=3729, Unknown=0, NotChecked=0, Total=4290 [2024-11-08 09:57:11,622 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand has 66 states, 66 states have (on average 1.7575757575757576) internal successors, (116), 66 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:16,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:57:16,308 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2024-11-08 09:57:16,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-08 09:57:16,308 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.7575757575757576) internal successors, (116), 66 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2024-11-08 09:57:16,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:57:16,309 INFO L225 Difference]: With dead ends: 124 [2024-11-08 09:57:16,309 INFO L226 Difference]: Without dead ends: 122 [2024-11-08 09:57:16,310 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 74 SyntacticMatches, 14 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6718 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2251, Invalid=13751, Unknown=0, NotChecked=0, Total=16002 [2024-11-08 09:57:16,310 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 237 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 199 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 1677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-08 09:57:16,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 350 Invalid, 1677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1474 Invalid, 4 Unknown, 0 Unchecked, 2.9s Time] [2024-11-08 09:57:16,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-08 09:57:16,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 112. [2024-11-08 09:57:16,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.054054054054054) internal successors, (117), 111 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:16,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2024-11-08 09:57:16,327 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 54 [2024-11-08 09:57:16,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:57:16,328 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2024-11-08 09:57:16,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.7575757575757576) internal successors, (116), 66 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:16,328 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2024-11-08 09:57:16,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-08 09:57:16,328 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:57:16,328 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:57:16,341 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-08 09:57:16,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:57:16,529 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:57:16,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:57:16,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1986281081, now seen corresponding path program 7 times [2024-11-08 09:57:16,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:57:16,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172450921] [2024-11-08 09:57:16,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:57:16,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:57:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:57:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:57:18,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:57:18,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172450921] [2024-11-08 09:57:18,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172450921] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:57:18,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806564791] [2024-11-08 09:57:18,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 09:57:18,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:57:18,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:57:18,133 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) [2024-11-08 09:57:18,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-08 09:57:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:57:18,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-08 09:57:18,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:57:18,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 09:57:18,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2024-11-08 09:57:18,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 09:57:18,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2024-11-08 09:57:18,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 09:57:18,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2024-11-08 09:57:18,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 09:57:18,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 09:57:18,726 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 15 [2024-11-08 09:57:18,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-08 09:57:18,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-08 09:57:18,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-08 09:57:18,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-08 09:57:18,804 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 15 [2024-11-08 09:57:18,905 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:57:18,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:57:19,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2024-11-08 09:57:19,033 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 46 treesize of output 42 [2024-11-08 09:57:19,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2024-11-08 09:57:19,169 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 46 treesize of output 42 [2024-11-08 09:57:19,306 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-08 09:57:19,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 20 [2024-11-08 09:57:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 09:57:19,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806564791] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:57:19,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:57:19,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 29, 21] total 66 [2024-11-08 09:57:19,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535795213] [2024-11-08 09:57:19,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:57:19,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-08 09:57:19,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:57:19,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-08 09:57:19,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3859, Unknown=0, NotChecked=0, Total=4290 [2024-11-08 09:57:19,389 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:20,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 09:57:20,468 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2024-11-08 09:57:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-08 09:57:20,469 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2024-11-08 09:57:20,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 09:57:20,469 INFO L225 Difference]: With dead ends: 123 [2024-11-08 09:57:20,469 INFO L226 Difference]: Without dead ends: 76 [2024-11-08 09:57:20,470 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2675 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=837, Invalid=7353, Unknown=0, NotChecked=0, Total=8190 [2024-11-08 09:57:20,471 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 159 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 09:57:20,471 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 335 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 09:57:20,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-11-08 09:57:20,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2024-11-08 09:57:20,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 66 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:20,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2024-11-08 09:57:20,482 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 58 [2024-11-08 09:57:20,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 09:57:20,482 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2024-11-08 09:57:20,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.090909090909091) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 09:57:20,482 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2024-11-08 09:57:20,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-08 09:57:20,482 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 09:57:20,482 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 09:57:20,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-08 09:57:20,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 09:57:20,683 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 09:57:20,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 09:57:20,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1133140609, now seen corresponding path program 8 times [2024-11-08 09:57:20,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 09:57:20,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497790729] [2024-11-08 09:57:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 09:57:20,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 09:57:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 09:57:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:57:22,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 09:57:22,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497790729] [2024-11-08 09:57:22,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497790729] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 09:57:22,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349342480] [2024-11-08 09:57:22,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 09:57:22,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 09:57:22,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 09:57:22,908 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) [2024-11-08 09:57:22,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-08 09:57:23,074 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 09:57:23,074 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 09:57:23,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-11-08 09:57:23,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 09:57:23,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-08 09:57:23,438 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 29 treesize of output 28 [2024-11-08 09:57:23,536 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:23,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2024-11-08 09:57:23,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 09:57:23,590 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:23,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2024-11-08 09:57:23,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 09:57:23,642 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:23,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 42 [2024-11-08 09:57:23,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 09:57:23,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 09:57:23,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 28 [2024-11-08 09:57:23,705 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 17 treesize of output 13 [2024-11-08 09:57:23,779 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 29 treesize of output 17 [2024-11-08 09:57:23,872 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 29 treesize of output 17 [2024-11-08 09:57:23,925 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 29 treesize of output 17 [2024-11-08 09:57:23,979 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 29 treesize of output 17 [2024-11-08 09:57:23,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-11-08 09:57:23,999 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 17 treesize of output 13 [2024-11-08 09:57:24,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 13 [2024-11-08 09:57:24,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 09:57:24,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2024-11-08 09:57:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 09:57:24,362 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 09:57:24,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2024-11-08 09:57:24,902 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 40 treesize of output 38 [2024-11-08 09:57:24,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 190 treesize of output 182 [2024-11-08 09:57:25,205 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 41 treesize of output 39 [2024-11-08 09:57:25,207 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 90 treesize of output 86 [2024-11-08 09:57:25,455 INFO L349 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2024-11-08 09:57:25,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 31 [2024-11-08 09:57:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 2 proven. 91 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-08 09:57:25,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349342480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 09:57:25,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 09:57:25,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 35, 28] total 98 [2024-11-08 09:57:25,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926768102] [2024-11-08 09:57:25,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 09:57:25,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-11-08 09:57:25,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 09:57:25,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-11-08 09:57:25,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=8823, Unknown=0, NotChecked=0, Total=9506 [2024-11-08 09:57:25,589 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 98 states, 98 states have (on average 1.8673469387755102) internal successors, (183), 98 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)