./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array4_pattern.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-patterns/array4_pattern.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 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-08 10:08:55,314 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 10:08:55,381 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-08 10:08:55,388 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 10:08:55,389 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 10:08:55,432 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 10:08:55,433 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 10:08:55,433 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 10:08:55,434 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 10:08:55,436 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 10:08:55,436 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 10:08:55,437 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 10:08:55,437 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 10:08:55,438 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 10:08:55,439 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 10:08:55,440 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 10:08:55,440 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-08 10:08:55,440 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 10:08:55,441 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 10:08:55,441 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 10:08:55,441 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 10:08:55,444 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-08 10:08:55,445 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 10:08:55,445 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-08 10:08:55,445 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 10:08:55,445 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 10:08:55,446 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-08 10:08:55,446 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 10:08:55,446 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 10:08:55,447 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 10:08:55,447 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 10:08:55,447 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 10:08:55,447 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:08:55,448 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 10:08:55,448 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 10:08:55,448 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-08 10:08:55,448 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 10:08:55,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 10:08:55,450 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 10:08:55,450 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 10:08:55,450 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 10:08:55,452 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 10:08:55,452 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2024-11-08 10:08:55,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 10:08:55,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 10:08:55,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 10:08:55,744 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 10:08:55,745 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 10:08:55,747 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array4_pattern.c [2024-11-08 10:08:57,186 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 10:08:57,359 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 10:08:57,360 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array4_pattern.c [2024-11-08 10:08:57,367 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37f22b354/6aa3e9ad330841b2bcef307831687fb9/FLAGeccacadb1 [2024-11-08 10:08:57,382 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37f22b354/6aa3e9ad330841b2bcef307831687fb9 [2024-11-08 10:08:57,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 10:08:57,385 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 10:08:57,387 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 10:08:57,387 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 10:08:57,394 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 10:08:57,395 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:08:57" (1/1) ... [2024-11-08 10:08:57,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b8a4570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:08:57, skipping insertion in model container [2024-11-08 10:08:57,396 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 10:08:57" (1/1) ... [2024-11-08 10:08:57,418 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 10:08:57,594 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-patterns/array4_pattern.c[1835,1848] [2024-11-08 10:08:57,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:08:57,629 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 10:08:57,640 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-patterns/array4_pattern.c[1835,1848] [2024-11-08 10:08:57,649 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 10:08:57,665 INFO L204 MainTranslator]: Completed translation [2024-11-08 10:08:57,666 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:08:57 WrapperNode [2024-11-08 10:08:57,666 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 10:08:57,667 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 10:08:57,668 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 10:08:57,668 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 10:08:57,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:08:57" (1/1) ... [2024-11-08 10:08:57,680 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:08:57" (1/1) ... [2024-11-08 10:08:57,707 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2024-11-08 10:08:57,707 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 10:08:57,708 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 10:08:57,708 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 10:08:57,708 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 10:08:57,718 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:08:57" (1/1) ... [2024-11-08 10:08:57,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:08:57" (1/1) ... [2024-11-08 10:08:57,720 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:08:57" (1/1) ... [2024-11-08 10:08:57,732 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2024-11-08 10:08:57,733 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:08:57" (1/1) ... [2024-11-08 10:08:57,733 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:08:57" (1/1) ... [2024-11-08 10:08:57,744 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:08:57" (1/1) ... [2024-11-08 10:08:57,749 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:08:57" (1/1) ... [2024-11-08 10:08:57,751 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:08:57" (1/1) ... [2024-11-08 10:08:57,752 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:08:57" (1/1) ... [2024-11-08 10:08:57,755 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 10:08:57,756 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 10:08:57,757 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 10:08:57,757 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 10:08:57,758 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:08:57" (1/1) ... [2024-11-08 10:08:57,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 10:08:57,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:08:57,792 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 10:08:57,800 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 10:08:57,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 10:08:57,846 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-08 10:08:57,847 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-08 10:08:57,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 10:08:57,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 10:08:57,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 10:08:57,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 10:08:57,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 10:08:57,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 10:08:57,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 10:08:57,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 10:08:57,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 10:08:57,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 10:08:57,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 10:08:57,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 10:08:57,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 10:08:57,956 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 10:08:57,959 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 10:08:58,161 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-08 10:08:58,162 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 10:08:58,178 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 10:08:58,179 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-08 10:08:58,180 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:08:58 BoogieIcfgContainer [2024-11-08 10:08:58,180 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 10:08:58,184 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 10:08:58,185 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 10:08:58,189 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 10:08:58,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 10:08:57" (1/3) ... [2024-11-08 10:08:58,191 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@620854bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:08:58, skipping insertion in model container [2024-11-08 10:08:58,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 10:08:57" (2/3) ... [2024-11-08 10:08:58,191 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@620854bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 10:08:58, skipping insertion in model container [2024-11-08 10:08:58,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 10:08:58" (3/3) ... [2024-11-08 10:08:58,193 INFO L112 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2024-11-08 10:08:58,212 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 10:08:58,212 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-08 10:08:58,281 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 10:08:58,288 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;@2ec34262, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 10:08:58,288 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-08 10:08:58,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-08 10:08:58,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-08 10:08:58,299 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:08:58,300 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:08:58,300 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:08:58,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:08:58,306 INFO L85 PathProgramCache]: Analyzing trace with hash -895237295, now seen corresponding path program 1 times [2024-11-08 10:08:58,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:08:58,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604714509] [2024-11-08 10:08:58,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:08:58,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:08:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:58,475 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:08:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:58,489 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 10:08:58,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:08:58,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604714509] [2024-11-08 10:08:58,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604714509] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:08:58,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:08:58,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 10:08:58,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062071279] [2024-11-08 10:08:58,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:08:58,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-08 10:08:58,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:08:58,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-08 10:08:58,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-08 10:08:58,532 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 10:08:58,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:08:58,553 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2024-11-08 10:08:58,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-08 10:08:58,555 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-11-08 10:08:58,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:08:58,560 INFO L225 Difference]: With dead ends: 63 [2024-11-08 10:08:58,560 INFO L226 Difference]: Without dead ends: 29 [2024-11-08 10:08:58,563 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 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 10:08:58,566 INFO L432 NwaCegarLoop]: 40 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, 40 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 10:08:58,567 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:08:58,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-08 10:08:58,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-08 10:08:58,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-08 10:08:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2024-11-08 10:08:58,599 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2024-11-08 10:08:58,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:08:58,599 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2024-11-08 10:08:58,599 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-08 10:08:58,599 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2024-11-08 10:08:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-08 10:08:58,601 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:08:58,601 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:08:58,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 10:08:58,602 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:08:58,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:08:58,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1276668511, now seen corresponding path program 1 times [2024-11-08 10:08:58,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:08:58,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802576418] [2024-11-08 10:08:58,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:08:58,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:08:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:58,862 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:08:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:58,867 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-08 10:08:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:58,881 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-08 10:08:58,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:58,901 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-08 10:08:58,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:58,916 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-08 10:08:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 10:08:58,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:08:58,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802576418] [2024-11-08 10:08:58,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802576418] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:08:58,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:08:58,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 10:08:58,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035623305] [2024-11-08 10:08:58,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:08:58,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 10:08:58,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:08:58,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 10:08:58,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 10:08:58,930 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 10:08:59,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:08:59,028 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2024-11-08 10:08:59,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 10:08:59,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2024-11-08 10:08:59,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:08:59,031 INFO L225 Difference]: With dead ends: 61 [2024-11-08 10:08:59,031 INFO L226 Difference]: Without dead ends: 39 [2024-11-08 10:08:59,032 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 10:08:59,034 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:08:59,035 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 55 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:08:59,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-08 10:08:59,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2024-11-08 10:08:59,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 10:08:59,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2024-11-08 10:08:59,050 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 42 [2024-11-08 10:08:59,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:08:59,051 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2024-11-08 10:08:59,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 10:08:59,052 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2024-11-08 10:08:59,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-08 10:08:59,053 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:08:59,053 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:08:59,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 10:08:59,054 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:08:59,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:08:59,055 INFO L85 PathProgramCache]: Analyzing trace with hash 467321885, now seen corresponding path program 1 times [2024-11-08 10:08:59,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:08:59,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721566110] [2024-11-08 10:08:59,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:08:59,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:08:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:59,266 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:08:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:59,271 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-08 10:08:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:59,279 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-08 10:08:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:59,292 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-08 10:08:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:59,300 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-08 10:08:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 10:08:59,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:08:59,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721566110] [2024-11-08 10:08:59,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721566110] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:08:59,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:08:59,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 10:08:59,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174045105] [2024-11-08 10:08:59,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:08:59,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 10:08:59,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:08:59,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 10:08:59,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 10:08:59,312 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 10:08:59,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:08:59,330 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2024-11-08 10:08:59,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 10:08:59,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2024-11-08 10:08:59,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:08:59,333 INFO L225 Difference]: With dead ends: 43 [2024-11-08 10:08:59,334 INFO L226 Difference]: Without dead ends: 39 [2024-11-08 10:08:59,335 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 10:08:59,336 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 10:08:59,338 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 10:08:59,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-08 10:08:59,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-08 10:08:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 10:08:59,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2024-11-08 10:08:59,355 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 42 [2024-11-08 10:08:59,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:08:59,355 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2024-11-08 10:08:59,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 10:08:59,356 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2024-11-08 10:08:59,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-08 10:08:59,357 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:08:59,357 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:08:59,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 10:08:59,358 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:08:59,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:08:59,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1822000481, now seen corresponding path program 1 times [2024-11-08 10:08:59,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:08:59,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248099527] [2024-11-08 10:08:59,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:08:59,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:08:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:59,509 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:08:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:59,514 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-08 10:08:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:59,523 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-11-08 10:08:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:59,530 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-08 10:08:59,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:59,538 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-08 10:08:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 10:08:59,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:08:59,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248099527] [2024-11-08 10:08:59,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248099527] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 10:08:59,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 10:08:59,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 10:08:59,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551734243] [2024-11-08 10:08:59,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 10:08:59,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 10:08:59,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:08:59,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 10:08:59,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 10:08:59,553 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 10:08:59,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:08:59,691 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2024-11-08 10:08:59,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 10:08:59,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2024-11-08 10:08:59,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:08:59,694 INFO L225 Difference]: With dead ends: 77 [2024-11-08 10:08:59,695 INFO L226 Difference]: Without dead ends: 43 [2024-11-08 10:08:59,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 10:08:59,697 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 10 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:08:59,698 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 92 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 10:08:59,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-08 10:08:59,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2024-11-08 10:08:59,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 10:08:59,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2024-11-08 10:08:59,713 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 44 [2024-11-08 10:08:59,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:08:59,713 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2024-11-08 10:08:59,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-08 10:08:59,714 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2024-11-08 10:08:59,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-08 10:08:59,714 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:08:59,714 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:08:59,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 10:08:59,715 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:08:59,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:08:59,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1436830497, now seen corresponding path program 1 times [2024-11-08 10:08:59,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:08:59,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472628339] [2024-11-08 10:08:59,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:08:59,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:08:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:08:59,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305891853] [2024-11-08 10:08:59,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:08:59,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:08:59,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:08:59,783 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 10:08:59,785 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 10:08:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:08:59,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-08 10:08:59,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:00,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 10:09:00,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2024-11-08 10:09:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 10:09:00,647 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:09:00,744 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 10:09:00,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2024-11-08 10:09:00,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 47 [2024-11-08 10:09:00,763 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 68 treesize of output 64 [2024-11-08 10:09:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-08 10:09:01,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:01,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472628339] [2024-11-08 10:09:01,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:09:01,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305891853] [2024-11-08 10:09:01,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305891853] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:09:01,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-08 10:09:01,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2024-11-08 10:09:01,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281614949] [2024-11-08 10:09:01,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-08 10:09:01,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-08 10:09:01,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:01,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-08 10:09:01,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2024-11-08 10:09:01,411 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 26 states have internal predecessors, (50), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-08 10:09:02,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:02,677 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2024-11-08 10:09:02,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-08 10:09:02,681 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 26 states have internal predecessors, (50), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 46 [2024-11-08 10:09:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:02,682 INFO L225 Difference]: With dead ends: 131 [2024-11-08 10:09:02,682 INFO L226 Difference]: Without dead ends: 46 [2024-11-08 10:09:02,683 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=449, Invalid=2307, Unknown=0, NotChecked=0, Total=2756 [2024-11-08 10:09:02,684 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 129 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:02,685 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 279 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 10:09:02,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-08 10:09:02,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2024-11-08 10:09:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 10:09:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2024-11-08 10:09:02,694 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 46 [2024-11-08 10:09:02,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:02,694 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2024-11-08 10:09:02,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 26 states have internal predecessors, (50), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-08 10:09:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2024-11-08 10:09:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-08 10:09:02,696 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:02,696 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:02,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 10:09:02,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:02,898 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:02,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:02,899 INFO L85 PathProgramCache]: Analyzing trace with hash 2142241571, now seen corresponding path program 2 times [2024-11-08 10:09:02,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:02,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587009170] [2024-11-08 10:09:02,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:02,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:03,026 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:09:03,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:03,030 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-08 10:09:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:03,034 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-08 10:09:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:03,038 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-08 10:09:03,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:03,043 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-08 10:09:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 10:09:03,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:03,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587009170] [2024-11-08 10:09:03,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587009170] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:09:03,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929500219] [2024-11-08 10:09:03,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:09:03,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:03,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:03,060 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 10:09:03,063 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 10:09:03,132 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:09:03,132 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:09:03,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 10:09:03,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 10:09:03,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:09:03,345 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 10:09:03,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929500219] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:09:03,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:09:03,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-08 10:09:03,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136494000] [2024-11-08 10:09:03,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:09:03,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 10:09:03,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:03,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 10:09:03,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-08 10:09:03,347 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-08 10:09:03,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:03,615 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2024-11-08 10:09:03,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 10:09:03,616 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 48 [2024-11-08 10:09:03,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:03,617 INFO L225 Difference]: With dead ends: 85 [2024-11-08 10:09:03,617 INFO L226 Difference]: Without dead ends: 62 [2024-11-08 10:09:03,618 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-08 10:09:03,618 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:03,619 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 114 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:09:03,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-08 10:09:03,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2024-11-08 10:09:03,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-08 10:09:03,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2024-11-08 10:09:03,632 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 48 [2024-11-08 10:09:03,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:03,633 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2024-11-08 10:09:03,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-08 10:09:03,633 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2024-11-08 10:09:03,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-08 10:09:03,634 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:03,634 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:03,655 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 10:09:03,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-08 10:09:03,835 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:03,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:03,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1458049061, now seen corresponding path program 3 times [2024-11-08 10:09:03,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:03,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565013771] [2024-11-08 10:09:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:03,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:09:03,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116323729] [2024-11-08 10:09:03,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:09:03,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:03,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:03,877 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 10:09:03,879 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 10:09:03,957 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-08 10:09:03,957 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:09:03,959 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-08 10:09:03,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:03,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 10:09:04,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 10:09:04,069 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 19 treesize of output 18 [2024-11-08 10:09:04,082 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 19 treesize of output 18 [2024-11-08 10:09:05,535 INFO L349 Elim1Store]: treesize reduction 152, result has 30.6 percent of original size [2024-11-08 10:09:05,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 94 [2024-11-08 10:09:05,678 INFO L349 Elim1Store]: treesize reduction 164, result has 29.0 percent of original size [2024-11-08 10:09:05,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 96 [2024-11-08 10:09:06,723 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:06,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 69 [2024-11-08 10:09:06,744 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:06,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 136 treesize of output 102 [2024-11-08 10:09:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 10:09:06,976 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:09:07,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:07,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565013771] [2024-11-08 10:09:07,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:09:07,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116323729] [2024-11-08 10:09:07,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116323729] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:09:07,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 10:09:07,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-11-08 10:09:07,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506898522] [2024-11-08 10:09:07,453 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 10:09:07,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-08 10:09:07,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:07,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-08 10:09:07,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2024-11-08 10:09:07,455 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-08 10:09:08,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:08,232 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2024-11-08 10:09:08,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-08 10:09:08,234 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2024-11-08 10:09:08,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:08,236 INFO L225 Difference]: With dead ends: 86 [2024-11-08 10:09:08,237 INFO L226 Difference]: Without dead ends: 82 [2024-11-08 10:09:08,237 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2024-11-08 10:09:08,238 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 29 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:08,238 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 221 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-08 10:09:08,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-08 10:09:08,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 68. [2024-11-08 10:09:08,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-08 10:09:08,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2024-11-08 10:09:08,252 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 50 [2024-11-08 10:09:08,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:08,252 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2024-11-08 10:09:08,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-08 10:09:08,253 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2024-11-08 10:09:08,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-08 10:09:08,254 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:08,254 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:08,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 10:09:08,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:08,457 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:08,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:08,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1079043239, now seen corresponding path program 4 times [2024-11-08 10:09:08,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:08,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021370129] [2024-11-08 10:09:08,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:08,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:08,579 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:09:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:08,581 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-11-08 10:09:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:08,584 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-08 10:09:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:08,603 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-11-08 10:09:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:08,608 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-11-08 10:09:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 10:09:08,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:08,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021370129] [2024-11-08 10:09:08,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021370129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:09:08,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938936789] [2024-11-08 10:09:08,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:09:08,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:08,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:08,614 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 10:09:08,615 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 10:09:08,693 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:09:08,693 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:09:08,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 10:09:08,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 10:09:08,782 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:09:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 10:09:08,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938936789] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:09:08,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:09:08,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-08 10:09:08,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551243597] [2024-11-08 10:09:08,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:09:08,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 10:09:08,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:08,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 10:09:08,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-08 10:09:08,841 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-08 10:09:09,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:09,095 INFO L93 Difference]: Finished difference Result 199 states and 252 transitions. [2024-11-08 10:09:09,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 10:09:09,095 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2024-11-08 10:09:09,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:09,097 INFO L225 Difference]: With dead ends: 199 [2024-11-08 10:09:09,097 INFO L226 Difference]: Without dead ends: 157 [2024-11-08 10:09:09,098 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 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 10:09:09,098 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 66 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:09,098 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 205 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 10:09:09,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-08 10:09:09,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 140. [2024-11-08 10:09:09,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 101 states have (on average 1.118811881188119) internal successors, (113), 101 states have internal predecessors, (113), 33 states have call successors, (33), 5 states have call predecessors, (33), 5 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2024-11-08 10:09:09,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 179 transitions. [2024-11-08 10:09:09,137 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 179 transitions. Word has length 52 [2024-11-08 10:09:09,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:09,137 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 179 transitions. [2024-11-08 10:09:09,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-08 10:09:09,138 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 179 transitions. [2024-11-08 10:09:09,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-08 10:09:09,141 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:09,141 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:09,159 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 10:09:09,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:09,346 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:09,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:09,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1518277417, now seen corresponding path program 5 times [2024-11-08 10:09:09,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:09,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635547971] [2024-11-08 10:09:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:09,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:09:09,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113450598] [2024-11-08 10:09:09,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 10:09:09,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:09,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:09,415 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 10:09:09,416 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 10:09:09,507 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-08 10:09:09,508 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:09:09,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-11-08 10:09:09,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:09,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 10:09:09,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 10:09:09,623 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 19 treesize of output 18 [2024-11-08 10:09:09,631 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 19 treesize of output 18 [2024-11-08 10:09:09,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:09,729 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 26 treesize of output 28 [2024-11-08 10:09:09,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:09,754 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 26 treesize of output 28 [2024-11-08 10:09:11,130 INFO L349 Elim1Store]: treesize reduction 120, result has 35.8 percent of original size [2024-11-08 10:09:11,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 94 [2024-11-08 10:09:11,256 INFO L349 Elim1Store]: treesize reduction 132, result has 33.7 percent of original size [2024-11-08 10:09:11,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 56 treesize of output 96 [2024-11-08 10:09:12,148 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:12,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 102 treesize of output 58 [2024-11-08 10:09:12,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:12,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 148 treesize of output 80 [2024-11-08 10:09:12,206 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-08 10:09:12,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:09:12,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:12,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635547971] [2024-11-08 10:09:12,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:09:12,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113450598] [2024-11-08 10:09:12,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113450598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:09:12,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 10:09:12,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-11-08 10:09:12,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642586012] [2024-11-08 10:09:12,673 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 10:09:12,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-08 10:09:12,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:12,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-08 10:09:12,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2024-11-08 10:09:12,675 INFO L87 Difference]: Start difference. First operand 140 states and 179 transitions. Second operand has 25 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-08 10:09:13,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:13,675 INFO L93 Difference]: Finished difference Result 180 states and 228 transitions. [2024-11-08 10:09:13,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-08 10:09:13,675 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 54 [2024-11-08 10:09:13,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:13,677 INFO L225 Difference]: With dead ends: 180 [2024-11-08 10:09:13,679 INFO L226 Difference]: Without dead ends: 176 [2024-11-08 10:09:13,680 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2024-11-08 10:09:13,680 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 40 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:13,682 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 360 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-08 10:09:13,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-11-08 10:09:13,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 161. [2024-11-08 10:09:13,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 117 states have internal predecessors, (131), 37 states have call successors, (37), 6 states have call predecessors, (37), 6 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-08 10:09:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 205 transitions. [2024-11-08 10:09:13,721 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 205 transitions. Word has length 54 [2024-11-08 10:09:13,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:13,721 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 205 transitions. [2024-11-08 10:09:13,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 23 states have internal predecessors, (38), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-08 10:09:13,722 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 205 transitions. [2024-11-08 10:09:13,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-08 10:09:13,723 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:13,723 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:13,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 10:09:13,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:13,928 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:13,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:13,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1171048789, now seen corresponding path program 6 times [2024-11-08 10:09:13,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:13,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258990962] [2024-11-08 10:09:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:13,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:14,073 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:09:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:14,076 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-08 10:09:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:14,079 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-11-08 10:09:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:14,082 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-11-08 10:09:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:14,085 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-11-08 10:09:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 10:09:14,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:14,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258990962] [2024-11-08 10:09:14,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258990962] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:09:14,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101866172] [2024-11-08 10:09:14,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 10:09:14,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:14,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:14,091 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 10:09:14,101 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 10:09:14,243 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-08 10:09:14,243 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:09:14,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 10:09:14,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 10:09:14,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:09:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 10:09:14,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101866172] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:09:14,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:09:14,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-08 10:09:14,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624547306] [2024-11-08 10:09:14,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:09:14,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 10:09:14,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:14,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 10:09:14,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-08 10:09:14,448 INFO L87 Difference]: Start difference. First operand 161 states and 205 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-08 10:09:14,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:14,794 INFO L93 Difference]: Finished difference Result 359 states and 469 transitions. [2024-11-08 10:09:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 10:09:14,794 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2024-11-08 10:09:14,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:14,797 INFO L225 Difference]: With dead ends: 359 [2024-11-08 10:09:14,797 INFO L226 Difference]: Without dead ends: 261 [2024-11-08 10:09:14,798 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 109 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2024-11-08 10:09:14,798 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 135 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:14,798 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 216 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 10:09:14,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-11-08 10:09:14,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 234. [2024-11-08 10:09:14,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 165 states have (on average 1.1272727272727272) internal successors, (186), 165 states have internal predecessors, (186), 61 states have call successors, (61), 7 states have call predecessors, (61), 7 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2024-11-08 10:09:14,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 308 transitions. [2024-11-08 10:09:14,843 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 308 transitions. Word has length 56 [2024-11-08 10:09:14,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:14,843 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 308 transitions. [2024-11-08 10:09:14,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-08 10:09:14,844 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 308 transitions. [2024-11-08 10:09:14,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-08 10:09:14,845 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:14,845 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:14,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 10:09:15,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:15,046 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:15,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:15,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1579439829, now seen corresponding path program 7 times [2024-11-08 10:09:15,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:15,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17241022] [2024-11-08 10:09:15,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:15,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:15,208 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:09:15,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:15,211 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-08 10:09:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:15,214 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-08 10:09:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:15,216 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-08 10:09:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:15,219 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-08 10:09:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 10:09:15,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:15,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17241022] [2024-11-08 10:09:15,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17241022] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:09:15,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559937642] [2024-11-08 10:09:15,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 10:09:15,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:15,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:15,226 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 10:09:15,227 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 10:09:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:15,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 10:09:15,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 10:09:15,395 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:09:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 10:09:15,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559937642] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:09:15,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:09:15,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-08 10:09:15,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340826932] [2024-11-08 10:09:15,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:09:15,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 10:09:15,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:15,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 10:09:15,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-08 10:09:15,475 INFO L87 Difference]: Start difference. First operand 234 states and 308 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-08 10:09:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:15,987 INFO L93 Difference]: Finished difference Result 260 states and 334 transitions. [2024-11-08 10:09:15,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 10:09:15,987 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2024-11-08 10:09:15,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:15,989 INFO L225 Difference]: With dead ends: 260 [2024-11-08 10:09:15,989 INFO L226 Difference]: Without dead ends: 256 [2024-11-08 10:09:15,990 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 108 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2024-11-08 10:09:15,990 INFO L432 NwaCegarLoop]: 83 mSDtfsCounter, 103 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:15,990 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 335 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 10:09:15,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-08 10:09:16,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 231. [2024-11-08 10:09:16,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 162 states have (on average 1.123456790123457) internal successors, (182), 163 states have internal predecessors, (182), 61 states have call successors, (61), 7 states have call predecessors, (61), 7 states have return successors, (61), 60 states have call predecessors, (61), 61 states have call successors, (61) [2024-11-08 10:09:16,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 304 transitions. [2024-11-08 10:09:16,037 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 304 transitions. Word has length 56 [2024-11-08 10:09:16,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:16,038 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 304 transitions. [2024-11-08 10:09:16,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-08 10:09:16,038 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 304 transitions. [2024-11-08 10:09:16,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-08 10:09:16,039 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:16,039 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:16,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-08 10:09:16,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:16,240 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:16,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:16,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1664986067, now seen corresponding path program 8 times [2024-11-08 10:09:16,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:16,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928539840] [2024-11-08 10:09:16,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:16,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:09:16,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18020031] [2024-11-08 10:09:16,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 10:09:16,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:16,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:16,307 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 10:09:16,309 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 10:09:16,441 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 10:09:16,441 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:09:16,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-08 10:09:16,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:16,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 10:09:16,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-08 10:09:16,534 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 19 treesize of output 18 [2024-11-08 10:09:16,539 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 19 treesize of output 18 [2024-11-08 10:09:16,604 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:16,604 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 26 treesize of output 28 [2024-11-08 10:09:16,617 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:16,617 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 26 treesize of output 28 [2024-11-08 10:09:16,696 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:16,696 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 33 treesize of output 38 [2024-11-08 10:09:16,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:16,711 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 33 treesize of output 38 [2024-11-08 10:09:18,101 INFO L349 Elim1Store]: treesize reduction 160, result has 35.7 percent of original size [2024-11-08 10:09:18,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 70 treesize of output 122 [2024-11-08 10:09:18,253 INFO L349 Elim1Store]: treesize reduction 176, result has 33.6 percent of original size [2024-11-08 10:09:18,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 70 treesize of output 124 [2024-11-08 10:09:21,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:21,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 170 treesize of output 124 [2024-11-08 10:09:21,099 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:21,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 297 treesize of output 203 [2024-11-08 10:09:22,043 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 10:09:22,043 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:09:22,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:22,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928539840] [2024-11-08 10:09:22,837 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:09:22,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18020031] [2024-11-08 10:09:22,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18020031] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:09:22,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 10:09:22,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-11-08 10:09:22,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345318767] [2024-11-08 10:09:22,838 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 10:09:22,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-08 10:09:22,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:22,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-08 10:09:22,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1348, Unknown=0, NotChecked=0, Total=1560 [2024-11-08 10:09:22,839 INFO L87 Difference]: Start difference. First operand 231 states and 304 transitions. Second operand has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-08 10:09:24,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:24,196 INFO L93 Difference]: Finished difference Result 260 states and 339 transitions. [2024-11-08 10:09:24,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-08 10:09:24,196 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 58 [2024-11-08 10:09:24,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:24,198 INFO L225 Difference]: With dead ends: 260 [2024-11-08 10:09:24,198 INFO L226 Difference]: Without dead ends: 256 [2024-11-08 10:09:24,199 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=246, Invalid=1560, Unknown=0, NotChecked=0, Total=1806 [2024-11-08 10:09:24,199 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 22 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:24,200 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 301 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 936 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-08 10:09:24,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2024-11-08 10:09:24,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 238. [2024-11-08 10:09:24,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 169 states have (on average 1.1242603550295858) internal successors, (190), 169 states have internal predecessors, (190), 61 states have call successors, (61), 7 states have call predecessors, (61), 7 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2024-11-08 10:09:24,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 312 transitions. [2024-11-08 10:09:24,244 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 312 transitions. Word has length 58 [2024-11-08 10:09:24,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:24,245 INFO L471 AbstractCegarLoop]: Abstraction has 238 states and 312 transitions. [2024-11-08 10:09:24,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-11-08 10:09:24,245 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 312 transitions. [2024-11-08 10:09:24,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-08 10:09:24,246 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:24,246 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:24,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 10:09:24,450 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,SelfDestructingSolverStorable11 [2024-11-08 10:09:24,451 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:24,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:24,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2024425135, now seen corresponding path program 9 times [2024-11-08 10:09:24,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:24,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472651713] [2024-11-08 10:09:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:24,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:24,640 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-11-08 10:09:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:24,643 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-11-08 10:09:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:24,645 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-08 10:09:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:24,648 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-11-08 10:09:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:24,651 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-11-08 10:09:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 10:09:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 10:09:24,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:09:24,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472651713] [2024-11-08 10:09:24,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472651713] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:09:24,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575618538] [2024-11-08 10:09:24,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 10:09:24,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:24,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:24,657 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 10:09:24,658 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 10:09:24,791 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-08 10:09:24,791 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:09:24,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 10:09:24,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 10:09:24,893 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:09:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-08 10:09:24,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575618538] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 10:09:24,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 10:09:24,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-08 10:09:24,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675210812] [2024-11-08 10:09:24,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 10:09:24,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 10:09:24,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:09:24,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 10:09:24,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-08 10:09:24,989 INFO L87 Difference]: Start difference. First operand 238 states and 312 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-08 10:09:25,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 10:09:25,373 INFO L93 Difference]: Finished difference Result 575 states and 760 transitions. [2024-11-08 10:09:25,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 10:09:25,375 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2024-11-08 10:09:25,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 10:09:25,378 INFO L225 Difference]: With dead ends: 575 [2024-11-08 10:09:25,378 INFO L226 Difference]: Without dead ends: 395 [2024-11-08 10:09:25,379 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2024-11-08 10:09:25,380 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 220 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 10:09:25,380 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 268 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 10:09:25,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2024-11-08 10:09:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 353. [2024-11-08 10:09:25,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 246 states have (on average 1.1260162601626016) internal successors, (277), 246 states have internal predecessors, (277), 97 states have call successors, (97), 9 states have call predecessors, (97), 9 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2024-11-08 10:09:25,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 471 transitions. [2024-11-08 10:09:25,457 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 471 transitions. Word has length 60 [2024-11-08 10:09:25,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 10:09:25,457 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 471 transitions. [2024-11-08 10:09:25,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-08 10:09:25,458 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 471 transitions. [2024-11-08 10:09:25,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-08 10:09:25,458 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 10:09:25,459 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 10:09:25,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 10:09:25,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 10:09:25,659 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-08 10:09:25,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 10:09:25,660 INFO L85 PathProgramCache]: Analyzing trace with hash 462082865, now seen corresponding path program 10 times [2024-11-08 10:09:25,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 10:09:25,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142208476] [2024-11-08 10:09:25,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 10:09:25,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 10:09:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-08 10:09:25,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640018941] [2024-11-08 10:09:25,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 10:09:25,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 10:09:25,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-08 10:09:25,705 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 10:09:25,706 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 10:09:25,912 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 10:09:25,912 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 10:09:25,915 WARN L253 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-08 10:09:25,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 10:09:25,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 10:09:25,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-11-08 10:09:26,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2024-11-08 10:09:26,034 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 25 treesize of output 24 [2024-11-08 10:09:26,119 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:26,120 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 36 treesize of output 38 [2024-11-08 10:09:26,130 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:26,130 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 36 treesize of output 38 [2024-11-08 10:09:26,223 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:26,223 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 47 treesize of output 52 [2024-11-08 10:09:26,238 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:26,239 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 47 treesize of output 52 [2024-11-08 10:09:26,370 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:26,371 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 58 treesize of output 66 [2024-11-08 10:09:26,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:26,392 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 58 treesize of output 66 [2024-11-08 10:09:28,818 INFO L349 Elim1Store]: treesize reduction 410, result has 28.2 percent of original size [2024-11-08 10:09:28,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 10 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 65 case distinctions, treesize of input 133 treesize of output 205 [2024-11-08 10:09:29,081 INFO L349 Elim1Store]: treesize reduction 390, result has 29.2 percent of original size [2024-11-08 10:09:29,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 10 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 65 case distinctions, treesize of input 133 treesize of output 203 [2024-11-08 10:09:33,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:33,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:33,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:33,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:33,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:33,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:33,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:33,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:33,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:33,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:33,869 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:33,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 305 treesize of output 329 [2024-11-08 10:09:33,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:33,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:33,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:33,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:33,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:33,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:33,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:33,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:33,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:33,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 10:09:34,051 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 10:09:34,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 30 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 492 treesize of output 416 [2024-11-08 10:10:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-08 10:10:19,936 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 10:10:22,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 10:10:22,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142208476] [2024-11-08 10:10:22,523 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-08 10:10:22,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640018941] [2024-11-08 10:10:22,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640018941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 10:10:22,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-08 10:10:22,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2024-11-08 10:10:22,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828562664] [2024-11-08 10:10:22,523 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-08 10:10:22,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-08 10:10:22,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 10:10:22,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-08 10:10:22,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=3065, Unknown=0, NotChecked=0, Total=3540 [2024-11-08 10:10:22,525 INFO L87 Difference]: Start difference. First operand 353 states and 471 transitions. Second operand has 38 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 33 states have internal predecessors, (43), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5)