./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/invert_string-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d 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/loops/invert_string-3.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 ca98535e808a51f7cfa7d21c9d33f259821212a6554e27f29c2bddd9197c0249 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 06:40:48,086 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 06:40:48,141 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 06:40:48,144 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 06:40:48,145 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 06:40:48,169 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 06:40:48,169 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 06:40:48,169 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 06:40:48,169 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 06:40:48,170 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 06:40:48,170 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 06:40:48,170 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 06:40:48,170 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 06:40:48,171 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 06:40:48,171 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 06:40:48,172 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 06:40:48,173 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 06:40:48,175 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 06:40:48,175 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 06:40:48,175 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 06:40:48,176 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 06:40:48,176 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 06:40:48,176 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 06:40:48,176 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 06:40:48,176 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 06:40:48,176 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 06:40:48,177 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 06:40:48,177 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 06:40:48,177 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 06:40:48,177 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 06:40:48,177 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 06:40:48,177 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 06:40:48,178 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 06:40:48,178 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 06:40:48,178 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 06:40:48,178 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 06:40:48,178 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 06:40:48,178 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 06:40:48,179 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 06:40:48,179 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 06:40:48,179 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 06:40:48,180 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 06:40:48,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca98535e808a51f7cfa7d21c9d33f259821212a6554e27f29c2bddd9197c0249 [2024-11-16 06:40:48,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 06:40:48,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 06:40:48,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 06:40:48,377 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 06:40:48,379 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 06:40:48,380 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/invert_string-3.c [2024-11-16 06:40:49,666 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 06:40:49,841 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 06:40:49,842 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/invert_string-3.c [2024-11-16 06:40:49,849 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c491cf390/6847e4164ca44f5ead1d231afd9e3da3/FLAGf33bb856b [2024-11-16 06:40:50,265 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c491cf390/6847e4164ca44f5ead1d231afd9e3da3 [2024-11-16 06:40:50,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 06:40:50,271 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 06:40:50,272 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 06:40:50,272 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 06:40:50,277 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 06:40:50,277 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 06:40:50" (1/1) ... [2024-11-16 06:40:50,279 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d65dea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:40:50, skipping insertion in model container [2024-11-16 06:40:50,279 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 06:40:50" (1/1) ... [2024-11-16 06:40:50,301 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 06:40:50,436 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/loops/invert_string-3.c[327,340] [2024-11-16 06:40:50,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 06:40:50,458 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 06:40:50,467 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/loops/invert_string-3.c[327,340] [2024-11-16 06:40:50,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 06:40:50,486 INFO L204 MainTranslator]: Completed translation [2024-11-16 06:40:50,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:40:50 WrapperNode [2024-11-16 06:40:50,487 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 06:40:50,488 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 06:40:50,488 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 06:40:50,488 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 06:40:50,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:40:50" (1/1) ... [2024-11-16 06:40:50,498 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:40:50" (1/1) ... [2024-11-16 06:40:50,527 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2024-11-16 06:40:50,531 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 06:40:50,532 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 06:40:50,532 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 06:40:50,532 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 06:40:50,542 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:40:50" (1/1) ... [2024-11-16 06:40:50,543 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:40:50" (1/1) ... [2024-11-16 06:40:50,544 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:40:50" (1/1) ... [2024-11-16 06:40:50,559 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 4, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 3 writes are split as follows [0, 2, 1]. [2024-11-16 06:40:50,559 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:40:50" (1/1) ... [2024-11-16 06:40:50,560 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:40:50" (1/1) ... [2024-11-16 06:40:50,565 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:40:50" (1/1) ... [2024-11-16 06:40:50,568 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:40:50" (1/1) ... [2024-11-16 06:40:50,569 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:40:50" (1/1) ... [2024-11-16 06:40:50,570 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:40:50" (1/1) ... [2024-11-16 06:40:50,572 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 06:40:50,574 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 06:40:50,574 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 06:40:50,574 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 06:40:50,575 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:40:50" (1/1) ... [2024-11-16 06:40:50,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 06:40:50,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:40:50,613 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) [2024-11-16 06:40:50,622 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 [2024-11-16 06:40:50,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 06:40:50,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 06:40:50,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 06:40:50,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-16 06:40:50,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-16 06:40:50,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 06:40:50,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 06:40:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-16 06:40:50,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 06:40:50,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 06:40:50,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 06:40:50,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 06:40:50,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-16 06:40:50,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-16 06:40:50,738 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 06:40:50,740 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 06:40:50,877 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-16 06:40:50,877 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 06:40:50,888 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 06:40:50,888 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 06:40:50,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 06:40:50 BoogieIcfgContainer [2024-11-16 06:40:50,889 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 06:40:50,891 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 06:40:50,892 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 06:40:50,894 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 06:40:50,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 06:40:50" (1/3) ... [2024-11-16 06:40:50,896 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e26cec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 06:40:50, skipping insertion in model container [2024-11-16 06:40:50,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 06:40:50" (2/3) ... [2024-11-16 06:40:50,896 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e26cec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 06:40:50, skipping insertion in model container [2024-11-16 06:40:50,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 06:40:50" (3/3) ... [2024-11-16 06:40:50,898 INFO L112 eAbstractionObserver]: Analyzing ICFG invert_string-3.c [2024-11-16 06:40:50,912 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 06:40:50,912 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 06:40:50,961 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 06:40:50,966 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;@ad64d66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 06:40:50,967 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-16 06:40:50,970 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:40:50,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-16 06:40:50,975 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:40:50,975 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:40:50,975 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:40:50,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:40:50,980 INFO L85 PathProgramCache]: Analyzing trace with hash 2027690452, now seen corresponding path program 1 times [2024-11-16 06:40:50,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:40:50,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073572929] [2024-11-16 06:40:50,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:40:50,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:40:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:40:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:40:51,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:40:51,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073572929] [2024-11-16 06:40:51,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073572929] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 06:40:51,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 06:40:51,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 06:40:51,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757257806] [2024-11-16 06:40:51,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:40:51,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 06:40:51,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:40:51,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 06:40:51,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 06:40:51,164 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:40:51,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:40:51,175 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2024-11-16 06:40:51,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 06:40:51,177 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-16 06:40:51,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:40:51,196 INFO L225 Difference]: With dead ends: 35 [2024-11-16 06:40:51,197 INFO L226 Difference]: Without dead ends: 15 [2024-11-16 06:40:51,200 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 06:40:51,204 INFO L432 NwaCegarLoop]: 21 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, 21 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 [2024-11-16 06:40:51,209 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 06:40:51,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-16 06:40:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-16 06:40:51,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:40:51,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-11-16 06:40:51,254 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2024-11-16 06:40:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:40:51,255 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-11-16 06:40:51,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:40:51,255 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-11-16 06:40:51,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-16 06:40:51,255 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:40:51,256 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:40:51,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 06:40:51,256 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:40:51,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:40:51,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2057583151, now seen corresponding path program 1 times [2024-11-16 06:40:51,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:40:51,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258874356] [2024-11-16 06:40:51,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:40:51,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:40:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:40:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:40:51,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:40:51,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258874356] [2024-11-16 06:40:51,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258874356] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 06:40:51,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 06:40:51,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-16 06:40:51,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425324792] [2024-11-16 06:40:51,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:40:51,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 06:40:51,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:40:51,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 06:40:51,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 06:40:51,584 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:40:51,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:40:51,634 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-11-16 06:40:51,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-16 06:40:51,635 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-16 06:40:51,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:40:51,635 INFO L225 Difference]: With dead ends: 25 [2024-11-16 06:40:51,636 INFO L226 Difference]: Without dead ends: 17 [2024-11-16 06:40:51,636 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-16 06:40:51,637 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 06:40:51,637 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 06:40:51,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-16 06:40:51,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-16 06:40:51,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:40:51,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-11-16 06:40:51,643 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2024-11-16 06:40:51,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:40:51,643 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-11-16 06:40:51,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:40:51,644 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-11-16 06:40:51,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-16 06:40:51,644 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:40:51,644 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:40:51,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 06:40:51,644 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:40:51,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:40:51,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1803284302, now seen corresponding path program 1 times [2024-11-16 06:40:51,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:40:51,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625153153] [2024-11-16 06:40:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:40:51,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:40:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:40:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 06:40:51,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:40:51,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625153153] [2024-11-16 06:40:51,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625153153] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 06:40:51,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 06:40:51,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 06:40:51,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125594260] [2024-11-16 06:40:51,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:40:51,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 06:40:51,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:40:51,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 06:40:51,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 06:40:51,823 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:40:51,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:40:51,845 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2024-11-16 06:40:51,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 06:40:51,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-16 06:40:51,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:40:51,846 INFO L225 Difference]: With dead ends: 32 [2024-11-16 06:40:51,846 INFO L226 Difference]: Without dead ends: 19 [2024-11-16 06:40:51,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 06:40:51,847 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-16 06:40:51,848 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-16 06:40:51,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-16 06:40:51,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-16 06:40:51,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:40:51,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-11-16 06:40:51,855 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2024-11-16 06:40:51,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:40:51,855 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-11-16 06:40:51,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:40:51,856 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-11-16 06:40:51,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-16 06:40:51,857 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:40:51,857 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:40:51,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 06:40:51,857 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:40:51,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:40:51,859 INFO L85 PathProgramCache]: Analyzing trace with hash -822461905, now seen corresponding path program 1 times [2024-11-16 06:40:51,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:40:51,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097322425] [2024-11-16 06:40:51,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:40:51,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:40:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:40:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 06:40:52,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:40:52,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097322425] [2024-11-16 06:40:52,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097322425] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:40:52,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082382427] [2024-11-16 06:40:52,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:40:52,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:40:52,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:40:52,012 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) [2024-11-16 06:40:52,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 06:40:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:40:52,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-16 06:40:52,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:40:52,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-16 06:40:52,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 06:40:52,469 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:40:52,653 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 26 treesize of output 18 [2024-11-16 06:40:52,656 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 18 treesize of output 16 [2024-11-16 06:40:52,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2024-11-16 06:40:52,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-11-16 06:40:52,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2024-11-16 06:40:52,674 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 33 treesize of output 24 [2024-11-16 06:40:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 06:40:52,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082382427] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:40:52,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:40:52,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 7] total 14 [2024-11-16 06:40:52,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585878894] [2024-11-16 06:40:52,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:40:52,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-16 06:40:52,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:40:52,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-16 06:40:52,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-16 06:40:52,721 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:40:53,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:40:53,152 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2024-11-16 06:40:53,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 06:40:53,153 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-16 06:40:53,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:40:53,153 INFO L225 Difference]: With dead ends: 76 [2024-11-16 06:40:53,153 INFO L226 Difference]: Without dead ends: 63 [2024-11-16 06:40:53,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2024-11-16 06:40:53,155 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 129 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 06:40:53,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 107 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 06:40:53,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-11-16 06:40:53,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 29. [2024-11-16 06:40:53,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:40:53,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-16 06:40:53,162 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 17 [2024-11-16 06:40:53,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:40:53,162 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-16 06:40:53,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:40:53,163 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-16 06:40:53,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-16 06:40:53,163 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:40:53,163 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:40:53,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 06:40:53,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:40:53,369 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:40:53,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:40:53,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2066820280, now seen corresponding path program 1 times [2024-11-16 06:40:53,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:40:53,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746165595] [2024-11-16 06:40:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:40:53,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:40:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:40:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-16 06:40:53,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:40:53,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746165595] [2024-11-16 06:40:53,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746165595] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:40:53,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972127706] [2024-11-16 06:40:53,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:40:53,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:40:53,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:40:53,508 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) [2024-11-16 06:40:53,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 06:40:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:40:53,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-16 06:40:53,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:40:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 06:40:53,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:40:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-16 06:40:53,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972127706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:40:53,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:40:53,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-16 06:40:53,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139563392] [2024-11-16 06:40:53,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:40:53,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-16 06:40:53,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:40:53,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-16 06:40:53,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-11-16 06:40:53,651 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:40:53,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:40:53,754 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2024-11-16 06:40:53,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 06:40:53,755 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-16 06:40:53,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:40:53,755 INFO L225 Difference]: With dead ends: 71 [2024-11-16 06:40:53,757 INFO L226 Difference]: Without dead ends: 50 [2024-11-16 06:40:53,758 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2024-11-16 06:40:53,758 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 90 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 06:40:53,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 72 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 06:40:53,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-16 06:40:53,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 29. [2024-11-16 06:40:53,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:40:53,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2024-11-16 06:40:53,771 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2024-11-16 06:40:53,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:40:53,771 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2024-11-16 06:40:53,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:40:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2024-11-16 06:40:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-16 06:40:53,772 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:40:53,772 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:40:53,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 06:40:53,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:40:53,977 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:40:53,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:40:53,978 INFO L85 PathProgramCache]: Analyzing trace with hash 455058894, now seen corresponding path program 2 times [2024-11-16 06:40:53,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:40:53,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163667378] [2024-11-16 06:40:53,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:40:53,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:40:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:40:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 06:40:54,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:40:54,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163667378] [2024-11-16 06:40:54,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163667378] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:40:54,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069951492] [2024-11-16 06:40:54,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 06:40:54,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:40:54,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:40:54,150 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) [2024-11-16 06:40:54,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 06:40:54,208 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 06:40:54,209 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:40:54,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-16 06:40:54,214 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:40:54,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 06:40:54,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 06:40:54,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-16 06:40:54,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 43 [2024-11-16 06:40:54,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 1 [2024-11-16 06:40:54,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2024-11-16 06:40:54,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-16 06:40:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:40:54,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:40:54,895 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 26 treesize of output 24 [2024-11-16 06:40:54,898 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 32 treesize of output 24 [2024-11-16 06:40:54,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2024-11-16 06:40:54,907 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 37 treesize of output 28 [2024-11-16 06:40:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 06:40:55,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069951492] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:40:55,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:40:55,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14, 10] total 27 [2024-11-16 06:40:55,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112856286] [2024-11-16 06:40:55,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:40:55,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-16 06:40:55,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:40:55,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-16 06:40:55,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2024-11-16 06:40:55,142 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:40:56,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:40:56,524 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2024-11-16 06:40:56,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-16 06:40:56,525 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-11-16 06:40:56,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:40:56,526 INFO L225 Difference]: With dead ends: 110 [2024-11-16 06:40:56,526 INFO L226 Difference]: Without dead ends: 102 [2024-11-16 06:40:56,527 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=528, Invalid=2228, Unknown=0, NotChecked=0, Total=2756 [2024-11-16 06:40:56,528 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 486 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-16 06:40:56,528 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 507 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-16 06:40:56,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-16 06:40:56,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 43. [2024-11-16 06:40:56,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:40:56,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2024-11-16 06:40:56,539 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 27 [2024-11-16 06:40:56,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:40:56,539 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2024-11-16 06:40:56,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 27 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:40:56,540 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2024-11-16 06:40:56,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-16 06:40:56,540 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:40:56,540 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:40:56,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-16 06:40:56,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:40:56,745 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:40:56,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:40:56,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1123396459, now seen corresponding path program 2 times [2024-11-16 06:40:56,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:40:56,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701024126] [2024-11-16 06:40:56,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:40:56,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:40:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:40:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-16 06:40:56,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:40:56,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701024126] [2024-11-16 06:40:56,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701024126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:40:56,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147049218] [2024-11-16 06:40:56,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 06:40:56,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:40:56,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:40:56,903 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) [2024-11-16 06:40:56,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 06:40:56,974 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 06:40:56,974 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:40:56,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-16 06:40:56,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:40:57,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2024-11-16 06:40:57,330 INFO L349 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2024-11-16 06:40:57,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2024-11-16 06:40:57,638 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 06:40:57,638 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:40:57,878 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:40:57,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 65 [2024-11-16 06:40:57,881 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 65 treesize of output 61 [2024-11-16 06:40:57,886 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:40:57,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 163 [2024-11-16 06:40:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 06:40:58,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147049218] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:40:58,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:40:58,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14, 12] total 27 [2024-11-16 06:40:58,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639860266] [2024-11-16 06:40:58,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:40:58,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-16 06:40:58,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:40:58,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-16 06:40:58,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2024-11-16 06:40:58,162 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:41:00,282 INFO L93 Difference]: Finished difference Result 206 states and 221 transitions. [2024-11-16 06:41:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-16 06:41:00,283 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-16 06:41:00,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:41:00,284 INFO L225 Difference]: With dead ends: 206 [2024-11-16 06:41:00,284 INFO L226 Difference]: Without dead ends: 173 [2024-11-16 06:41:00,285 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=700, Invalid=3206, Unknown=0, NotChecked=0, Total=3906 [2024-11-16 06:41:00,286 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 501 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-16 06:41:00,286 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [501 Valid, 477 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-16 06:41:00,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-16 06:41:00,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 55. [2024-11-16 06:41:00,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:00,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2024-11-16 06:41:00,300 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 33 [2024-11-16 06:41:00,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:41:00,300 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2024-11-16 06:41:00,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 27 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:00,300 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2024-11-16 06:41:00,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-16 06:41:00,301 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:41:00,301 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:41:00,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-16 06:41:00,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:41:00,502 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:41:00,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:41:00,502 INFO L85 PathProgramCache]: Analyzing trace with hash 430653982, now seen corresponding path program 3 times [2024-11-16 06:41:00,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:41:00,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459732733] [2024-11-16 06:41:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:41:00,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:41:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:41:00,645 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-16 06:41:00,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:41:00,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459732733] [2024-11-16 06:41:00,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459732733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:41:00,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615392314] [2024-11-16 06:41:00,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 06:41:00,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:41:00,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:41:00,647 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) [2024-11-16 06:41:00,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 06:41:00,752 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-16 06:41:00,752 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:41:00,757 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-16 06:41:00,758 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:41:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-16 06:41:00,807 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:41:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-16 06:41:00,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615392314] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:41:00,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:41:00,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-16 06:41:00,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935919553] [2024-11-16 06:41:00,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:41:00,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-16 06:41:00,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:41:00,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-16 06:41:00,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-11-16 06:41:00,938 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:01,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:41:01,196 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2024-11-16 06:41:01,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-16 06:41:01,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-16 06:41:01,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:41:01,197 INFO L225 Difference]: With dead ends: 110 [2024-11-16 06:41:01,197 INFO L226 Difference]: Without dead ends: 67 [2024-11-16 06:41:01,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2024-11-16 06:41:01,198 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 06:41:01,198 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 108 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 06:41:01,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-11-16 06:41:01,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-11-16 06:41:01,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 66 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:01,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2024-11-16 06:41:01,221 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 39 [2024-11-16 06:41:01,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:41:01,221 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2024-11-16 06:41:01,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:01,222 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2024-11-16 06:41:01,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-16 06:41:01,222 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:41:01,223 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:41:01,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-16 06:41:01,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:41:01,423 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:41:01,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:41:01,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2015413761, now seen corresponding path program 4 times [2024-11-16 06:41:01,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:41:01,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221479089] [2024-11-16 06:41:01,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:41:01,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:41:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:41:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:41:02,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:41:02,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221479089] [2024-11-16 06:41:02,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221479089] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:41:02,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989180012] [2024-11-16 06:41:02,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 06:41:02,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:41:02,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:41:02,595 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) [2024-11-16 06:41:02,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 06:41:02,663 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 06:41:02,663 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:41:02,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-16 06:41:02,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:41:02,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-16 06:41:02,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 06:41:02,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2024-11-16 06:41:03,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 06:41:03,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 06:41:03,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-16 06:41:03,098 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:41:03,099 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 44 treesize of output 46 [2024-11-16 06:41:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-16 06:41:03,753 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:41:04,184 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:41:04,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 85 [2024-11-16 06:41:04,188 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 85 treesize of output 81 [2024-11-16 06:41:04,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:41:04,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2031 treesize of output 1941 [2024-11-16 06:41:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-16 06:41:04,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989180012] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:41:04,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:41:04,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 14] total 39 [2024-11-16 06:41:04,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057290504] [2024-11-16 06:41:04,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:41:04,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-16 06:41:04,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:41:04,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-16 06:41:04,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2024-11-16 06:41:04,454 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:07,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:41:07,086 INFO L93 Difference]: Finished difference Result 232 states and 242 transitions. [2024-11-16 06:41:07,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-16 06:41:07,086 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-16 06:41:07,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:41:07,087 INFO L225 Difference]: With dead ends: 232 [2024-11-16 06:41:07,088 INFO L226 Difference]: Without dead ends: 229 [2024-11-16 06:41:07,089 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=937, Invalid=5383, Unknown=0, NotChecked=0, Total=6320 [2024-11-16 06:41:07,090 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 842 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-16 06:41:07,090 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 740 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-16 06:41:07,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-11-16 06:41:07,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 71. [2024-11-16 06:41:07,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 70 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:07,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2024-11-16 06:41:07,123 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 41 [2024-11-16 06:41:07,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:41:07,123 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2024-11-16 06:41:07,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:07,124 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2024-11-16 06:41:07,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-16 06:41:07,126 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:41:07,126 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:41:07,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-16 06:41:07,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:41:07,327 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:41:07,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:41:07,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1385082069, now seen corresponding path program 3 times [2024-11-16 06:41:07,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:41:07,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448549671] [2024-11-16 06:41:07,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:41:07,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:41:07,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:41:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-16 06:41:07,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:41:07,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448549671] [2024-11-16 06:41:07,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448549671] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 06:41:07,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 06:41:07,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-16 06:41:07,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644290239] [2024-11-16 06:41:07,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 06:41:07,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-16 06:41:07,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:41:07,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-16 06:41:07,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2024-11-16 06:41:07,604 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:07,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:41:07,742 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2024-11-16 06:41:07,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 06:41:07,742 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-16 06:41:07,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:41:07,743 INFO L225 Difference]: With dead ends: 105 [2024-11-16 06:41:07,743 INFO L226 Difference]: Without dead ends: 71 [2024-11-16 06:41:07,743 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2024-11-16 06:41:07,744 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 87 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-16 06:41:07,744 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 65 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-16 06:41:07,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-16 06:41:07,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2024-11-16 06:41:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2024-11-16 06:41:07,762 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 41 [2024-11-16 06:41:07,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:41:07,762 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2024-11-16 06:41:07,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:07,762 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2024-11-16 06:41:07,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-16 06:41:07,763 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:41:07,763 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:41:07,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-16 06:41:07,763 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:41:07,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:41:07,764 INFO L85 PathProgramCache]: Analyzing trace with hash -562502041, now seen corresponding path program 5 times [2024-11-16 06:41:07,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:41:07,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201976671] [2024-11-16 06:41:07,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:41:07,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:41:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:41:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-16 06:41:08,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:41:08,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201976671] [2024-11-16 06:41:08,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201976671] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:41:08,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25865114] [2024-11-16 06:41:08,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 06:41:08,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:41:08,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:41:08,516 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) [2024-11-16 06:41:08,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 06:41:08,739 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-16 06:41:08,739 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:41:08,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-16 06:41:08,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:41:08,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-16 06:41:08,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2024-11-16 06:41:09,069 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:41:09,069 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 44 treesize of output 46 [2024-11-16 06:41:09,169 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:41:09,170 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 55 treesize of output 60 [2024-11-16 06:41:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-16 06:41:09,714 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:41:10,174 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:41:10,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 37 [2024-11-16 06:41:10,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2024-11-16 06:41:10,180 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 3218 treesize of output 3146 [2024-11-16 06:41:10,210 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:41:10,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 37 [2024-11-16 06:41:10,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2024-11-16 06:41:10,217 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 3218 treesize of output 3146 [2024-11-16 06:41:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-16 06:41:10,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25865114] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:41:10,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:41:10,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 40 [2024-11-16 06:41:10,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466682350] [2024-11-16 06:41:10,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:41:10,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-16 06:41:10,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:41:10,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-16 06:41:10,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2024-11-16 06:41:10,346 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:11,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:41:11,426 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2024-11-16 06:41:11,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-16 06:41:11,426 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-16 06:41:11,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:41:11,427 INFO L225 Difference]: With dead ends: 85 [2024-11-16 06:41:11,427 INFO L226 Difference]: Without dead ends: 82 [2024-11-16 06:41:11,428 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=679, Invalid=2743, Unknown=0, NotChecked=0, Total=3422 [2024-11-16 06:41:11,428 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 220 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-16 06:41:11,428 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 352 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-16 06:41:11,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-16 06:41:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 60. [2024-11-16 06:41:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:11,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2024-11-16 06:41:11,454 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 45 [2024-11-16 06:41:11,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:41:11,454 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2024-11-16 06:41:11,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:11,455 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2024-11-16 06:41:11,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-16 06:41:11,455 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:41:11,455 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:41:11,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-16 06:41:11,659 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 [2024-11-16 06:41:11,660 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:41:11,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:41:11,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1105846577, now seen corresponding path program 6 times [2024-11-16 06:41:11,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:41:11,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639537784] [2024-11-16 06:41:11,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:41:11,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:41:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:41:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 06:41:13,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:41:13,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639537784] [2024-11-16 06:41:13,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639537784] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:41:13,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071805616] [2024-11-16 06:41:13,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 06:41:13,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:41:13,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:41:13,209 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) [2024-11-16 06:41:13,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 06:41:13,399 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-16 06:41:13,400 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 06:41:13,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-16 06:41:13,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:41:13,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-11-16 06:41:13,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2024-11-16 06:41:13,731 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:41:13,731 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 44 treesize of output 46 [2024-11-16 06:41:13,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:41:13,865 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 57 treesize of output 62 [2024-11-16 06:41:13,990 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:41:13,991 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 68 treesize of output 76 [2024-11-16 06:41:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-16 06:41:14,679 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:41:15,241 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:41:15,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 43 [2024-11-16 06:41:15,244 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 43 treesize of output 41 [2024-11-16 06:41:15,248 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 3198 treesize of output 3162 [2024-11-16 06:41:15,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-16 06:41:15,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 43 [2024-11-16 06:41:15,282 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 43 treesize of output 41 [2024-11-16 06:41:15,286 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 6418 treesize of output 6346 [2024-11-16 06:41:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-16 06:41:15,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071805616] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:41:15,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:41:15,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 15] total 46 [2024-11-16 06:41:15,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533489030] [2024-11-16 06:41:15,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:41:15,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-16 06:41:15,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:41:15,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-16 06:41:15,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1817, Unknown=0, NotChecked=0, Total=2070 [2024-11-16 06:41:15,368 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 46 states, 46 states have (on average 2.5652173913043477) internal successors, (118), 46 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:16,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:41:16,745 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2024-11-16 06:41:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-16 06:41:16,745 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.5652173913043477) internal successors, (118), 46 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-16 06:41:16,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:41:16,746 INFO L225 Difference]: With dead ends: 75 [2024-11-16 06:41:16,746 INFO L226 Difference]: Without dead ends: 72 [2024-11-16 06:41:16,747 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=654, Invalid=3636, Unknown=0, NotChecked=0, Total=4290 [2024-11-16 06:41:16,747 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 170 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-16 06:41:16,747 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 423 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-16 06:41:16,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-11-16 06:41:16,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2024-11-16 06:41:16,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:16,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2024-11-16 06:41:16,784 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 49 [2024-11-16 06:41:16,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:41:16,784 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2024-11-16 06:41:16,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.5652173913043477) internal successors, (118), 46 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:16,785 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2024-11-16 06:41:16,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-16 06:41:16,785 INFO L207 NwaCegarLoop]: Found error trace [2024-11-16 06:41:16,785 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 06:41:16,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-16 06:41:16,989 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 [2024-11-16 06:41:16,990 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-16 06:41:16,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 06:41:16,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1575951561, now seen corresponding path program 7 times [2024-11-16 06:41:16,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 06:41:16,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249023102] [2024-11-16 06:41:16,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 06:41:16,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 06:41:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:41:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 5 proven. 50 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-16 06:41:17,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 06:41:17,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249023102] [2024-11-16 06:41:17,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249023102] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 06:41:17,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453237119] [2024-11-16 06:41:17,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 06:41:17,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 06:41:17,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 06:41:17,179 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) [2024-11-16 06:41:17,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 06:41:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 06:41:17,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-16 06:41:17,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 06:41:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-16 06:41:17,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 06:41:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 5 proven. 80 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-16 06:41:17,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453237119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 06:41:17,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 06:41:17,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 15] total 34 [2024-11-16 06:41:17,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194156329] [2024-11-16 06:41:17,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 06:41:17,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-16 06:41:17,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 06:41:17,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-16 06:41:17,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2024-11-16 06:41:17,826 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 34 states, 34 states have (on average 3.264705882352941) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:18,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-16 06:41:18,347 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2024-11-16 06:41:18,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-16 06:41:18,347 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.264705882352941) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2024-11-16 06:41:18,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-16 06:41:18,348 INFO L225 Difference]: With dead ends: 100 [2024-11-16 06:41:18,348 INFO L226 Difference]: Without dead ends: 0 [2024-11-16 06:41:18,349 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=1669, Unknown=0, NotChecked=0, Total=1980 [2024-11-16 06:41:18,349 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 91 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-16 06:41:18,349 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 317 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-16 06:41:18,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-16 06:41:18,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-16 06:41:18,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:18,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-16 06:41:18,350 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2024-11-16 06:41:18,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-16 06:41:18,350 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-16 06:41:18,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.264705882352941) internal successors, (111), 34 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 06:41:18,350 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-16 06:41:18,350 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-16 06:41:18,356 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-16 06:41:18,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-16 06:41:18,560 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 [2024-11-16 06:41:18,563 INFO L407 BasicCegarLoop]: Path program histogram: [7, 3, 1, 1, 1] [2024-11-16 06:41:18,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.