./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/array-tiling/mbpr2.c --full-output --preprocessor.use.memory.slicer true --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6ae2ee47 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/array-tiling/mbpr2.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 a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 --preprocessor.use.memory.slicer true --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 18:15:24,494 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 18:15:24,573 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-22 18:15:24,577 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 18:15:24,578 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 18:15:24,606 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 18:15:24,608 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 18:15:24,608 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 18:15:24,609 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-22 18:15:24,612 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-22 18:15:24,612 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 18:15:24,613 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 18:15:24,614 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 18:15:24,615 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 18:15:24,615 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 18:15:24,616 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 18:15:24,616 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-22 18:15:24,616 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 18:15:24,616 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 18:15:24,617 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 18:15:24,617 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 18:15:24,617 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-22 18:15:24,618 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 18:15:24,618 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-22 18:15:24,618 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 18:15:24,618 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-22 18:15:24,619 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 18:15:24,619 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 18:15:24,619 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 18:15:24,620 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 18:15:24,621 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 18:15:24,621 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:15:24,621 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 18:15:24,621 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 18:15:24,621 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-22 18:15:24,622 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 18:15:24,622 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 18:15:24,622 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 18:15:24,622 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 18:15:24,622 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-22 18:15:24,622 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 18:15:24,623 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 18:15:24,623 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Use memory slicer -> true [2023-11-22 18:15:24,860 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 18:15:24,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 18:15:24,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 18:15:24,882 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 18:15:24,882 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 18:15:24,883 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr2.c [2023-11-22 18:15:26,080 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 18:15:26,221 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 18:15:26,221 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr2.c [2023-11-22 18:15:26,227 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7ff1ecf7/e814955a6ac84fcb809b14af73234dbd/FLAGa131b1b04 [2023-11-22 18:15:26,240 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7ff1ecf7/e814955a6ac84fcb809b14af73234dbd [2023-11-22 18:15:26,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 18:15:26,244 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 18:15:26,247 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 18:15:26,247 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 18:15:26,252 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 18:15:26,252 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:15:26" (1/1) ... [2023-11-22 18:15:26,253 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18db330b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:26, skipping insertion in model container [2023-11-22 18:15:26,253 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 06:15:26" (1/1) ... [2023-11-22 18:15:26,270 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 18:15:26,375 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr2.c[396,409] [2023-11-22 18:15:26,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:15:26,399 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 18:15:26,413 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mbpr2.c[396,409] [2023-11-22 18:15:26,425 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 18:15:26,437 INFO L206 MainTranslator]: Completed translation [2023-11-22 18:15:26,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:26 WrapperNode [2023-11-22 18:15:26,438 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 18:15:26,443 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 18:15:26,443 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 18:15:26,443 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 18:15:26,449 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:26" (1/1) ... [2023-11-22 18:15:26,456 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:26" (1/1) ... [2023-11-22 18:15:26,475 INFO L138 Inliner]: procedures = 15, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2023-11-22 18:15:26,475 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 18:15:26,476 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 18:15:26,476 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 18:15:26,476 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 18:15:26,485 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:26" (1/1) ... [2023-11-22 18:15:26,485 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:26" (1/1) ... [2023-11-22 18:15:26,487 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:26" (1/1) ... [2023-11-22 18:15:26,497 INFO L189 HeapSplitter]: Split 20 memory accesses to 3 slices as follows [2, 8, 10] [2023-11-22 18:15:26,497 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:26" (1/1) ... [2023-11-22 18:15:26,497 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:26" (1/1) ... [2023-11-22 18:15:26,503 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:26" (1/1) ... [2023-11-22 18:15:26,506 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:26" (1/1) ... [2023-11-22 18:15:26,508 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:26" (1/1) ... [2023-11-22 18:15:26,509 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:26" (1/1) ... [2023-11-22 18:15:26,510 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 18:15:26,511 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 18:15:26,511 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 18:15:26,511 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 18:15:26,512 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:26" (1/1) ... [2023-11-22 18:15:26,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 18:15:26,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:26,545 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-22 18:15:26,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-22 18:15:26,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 18:15:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-22 18:15:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-22 18:15:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-22 18:15:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 18:15:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-22 18:15:26,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-22 18:15:26,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-22 18:15:26,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 18:15:26,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 18:15:26,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-22 18:15:26,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-22 18:15:26,583 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-22 18:15:26,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 18:15:26,667 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 18:15:26,669 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 18:15:26,898 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 18:15:26,918 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 18:15:26,922 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-22 18:15:26,923 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:15:26 BoogieIcfgContainer [2023-11-22 18:15:26,923 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 18:15:26,925 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 18:15:26,925 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 18:15:26,928 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 18:15:26,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 06:15:26" (1/3) ... [2023-11-22 18:15:26,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e6dce5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:15:26, skipping insertion in model container [2023-11-22 18:15:26,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 06:15:26" (2/3) ... [2023-11-22 18:15:26,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e6dce5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 06:15:26, skipping insertion in model container [2023-11-22 18:15:26,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 06:15:26" (3/3) ... [2023-11-22 18:15:26,930 INFO L112 eAbstractionObserver]: Analyzing ICFG mbpr2.c [2023-11-22 18:15:26,946 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 18:15:26,946 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-22 18:15:26,992 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 18:15:26,999 INFO L357 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, mHoare=true, 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;@3a3fee27, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 18:15:26,999 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-22 18:15:27,003 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 23 states have internal predecessors, (36), 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) [2023-11-22 18:15:27,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-22 18:15:27,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:27,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:27,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:27,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:27,015 INFO L85 PathProgramCache]: Analyzing trace with hash -951462663, now seen corresponding path program 1 times [2023-11-22 18:15:27,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:27,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192570074] [2023-11-22 18:15:27,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:27,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:27,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:15:27,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:27,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192570074] [2023-11-22 18:15:27,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192570074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:15:27,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:15:27,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-22 18:15:27,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471124872] [2023-11-22 18:15:27,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:15:27,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-22 18:15:27,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:27,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-22 18:15:27,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-22 18:15:27,279 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:27,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:27,312 INFO L93 Difference]: Finished difference Result 44 states and 65 transitions. [2023-11-22 18:15:27,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-22 18:15:27,314 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-22 18:15:27,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:27,319 INFO L225 Difference]: With dead ends: 44 [2023-11-22 18:15:27,319 INFO L226 Difference]: Without dead ends: 20 [2023-11-22 18:15:27,321 INFO L412 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 [2023-11-22 18:15:27,324 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:27,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:15:27,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-22 18:15:27,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-22 18:15:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:27,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-11-22 18:15:27,362 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 14 [2023-11-22 18:15:27,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:27,363 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-11-22 18:15:27,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:27,363 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-11-22 18:15:27,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-22 18:15:27,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:27,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:27,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 18:15:27,370 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:27,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:27,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1175939807, now seen corresponding path program 1 times [2023-11-22 18:15:27,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:27,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656356088] [2023-11-22 18:15:27,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:27,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:15:27,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:27,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656356088] [2023-11-22 18:15:27,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656356088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:15:27,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:15:27,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-22 18:15:27,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128661636] [2023-11-22 18:15:27,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:15:27,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-22 18:15:27,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:27,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-22 18:15:27,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-22 18:15:27,556 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2023-11-22 18:15:27,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:27,593 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2023-11-22 18:15:27,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 18:15:27,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-22 18:15:27,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:27,594 INFO L225 Difference]: With dead ends: 25 [2023-11-22 18:15:27,594 INFO L226 Difference]: Without dead ends: 23 [2023-11-22 18:15:27,595 INFO L412 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 [2023-11-22 18:15:27,596 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:27,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 54 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:15:27,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-22 18:15:27,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-11-22 18:15:27,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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) [2023-11-22 18:15:27,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-11-22 18:15:27,601 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2023-11-22 18:15:27,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:27,601 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-11-22 18:15:27,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2023-11-22 18:15:27,602 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-11-22 18:15:27,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-22 18:15:27,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:27,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:27,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 18:15:27,603 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:27,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:27,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1175880225, now seen corresponding path program 1 times [2023-11-22 18:15:27,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:27,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101961327] [2023-11-22 18:15:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:27,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:15:27,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:27,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101961327] [2023-11-22 18:15:27,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101961327] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:15:27,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:15:27,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-22 18:15:27,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673954099] [2023-11-22 18:15:27,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:15:27,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 18:15:27,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:27,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 18:15:27,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-22 18:15:27,851 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2023-11-22 18:15:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:27,913 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2023-11-22 18:15:27,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-22 18:15:27,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-22 18:15:27,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:27,916 INFO L225 Difference]: With dead ends: 42 [2023-11-22 18:15:27,916 INFO L226 Difference]: Without dead ends: 28 [2023-11-22 18:15:27,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-22 18:15:27,923 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:27,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:15:27,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-22 18:15:27,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2023-11-22 18:15:27,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-11-22 18:15:27,931 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 14 [2023-11-22 18:15:27,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:27,931 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-11-22 18:15:27,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2023-11-22 18:15:27,931 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-11-22 18:15:27,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-22 18:15:27,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:27,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:27,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 18:15:27,932 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:27,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:27,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1957529468, now seen corresponding path program 1 times [2023-11-22 18:15:27,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:27,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493422823] [2023-11-22 18:15:27,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:27,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:15:28,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:28,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493422823] [2023-11-22 18:15:28,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493422823] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 18:15:28,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 18:15:28,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 18:15:28,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137264471] [2023-11-22 18:15:28,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 18:15:28,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 18:15:28,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:28,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 18:15:28,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 18:15:28,075 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2023-11-22 18:15:28,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:28,094 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2023-11-22 18:15:28,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 18:15:28,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2023-11-22 18:15:28,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:28,096 INFO L225 Difference]: With dead ends: 37 [2023-11-22 18:15:28,096 INFO L226 Difference]: Without dead ends: 24 [2023-11-22 18:15:28,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 18:15:28,098 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 16 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 [2023-11-22 18:15:28,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 16 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-22 18:15:28,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-22 18:15:28,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-22 18:15:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2023-11-22 18:15:28,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-22 18:15:28,103 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 20 [2023-11-22 18:15:28,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:28,103 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-22 18:15:28,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2023-11-22 18:15:28,104 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-22 18:15:28,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-22 18:15:28,104 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:28,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:28,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 18:15:28,105 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:28,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:28,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1657379458, now seen corresponding path program 1 times [2023-11-22 18:15:28,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:28,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222000088] [2023-11-22 18:15:28,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:28,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:15:28,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:28,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222000088] [2023-11-22 18:15:28,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222000088] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:28,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8928847] [2023-11-22 18:15:28,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:28,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:28,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:28,708 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) [2023-11-22 18:15:28,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-22 18:15:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:28,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-22 18:15:28,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:15:28,916 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 [2023-11-22 18:15:28,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:28,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-11-22 18:15:28,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-22 18:15:29,038 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:29,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-11-22 18:15:29,122 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:29,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2023-11-22 18:15:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:15:29,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:15:29,276 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 17 treesize of output 15 [2023-11-22 18:15:29,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-22 18:15:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:15:29,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8928847] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:15:29,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:15:29,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7] total 20 [2023-11-22 18:15:29,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418351723] [2023-11-22 18:15:29,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:15:29,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-22 18:15:29,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:29,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-22 18:15:29,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-11-22 18:15:29,334 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 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) [2023-11-22 18:15:29,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:29,613 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2023-11-22 18:15:29,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-22 18:15:29,614 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 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 20 [2023-11-22 18:15:29,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:29,615 INFO L225 Difference]: With dead ends: 61 [2023-11-22 18:15:29,615 INFO L226 Difference]: Without dead ends: 43 [2023-11-22 18:15:29,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2023-11-22 18:15:29,619 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 138 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:29,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 68 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:15:29,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-22 18:15:29,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2023-11-22 18:15:29,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-11-22 18:15:29,632 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2023-11-22 18:15:29,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:29,632 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-11-22 18:15:29,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 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) [2023-11-22 18:15:29,633 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-11-22 18:15:29,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-22 18:15:29,636 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:29,636 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:29,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-22 18:15:29,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:29,851 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:29,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:29,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1879775925, now seen corresponding path program 1 times [2023-11-22 18:15:29,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:29,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383729845] [2023-11-22 18:15:29,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:29,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:15:30,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:30,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383729845] [2023-11-22 18:15:30,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383729845] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:30,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622700913] [2023-11-22 18:15:30,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:30,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:30,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:30,202 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) [2023-11-22 18:15:30,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-22 18:15:30,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:30,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-22 18:15:30,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:15:30,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-22 18:15:30,306 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:30,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-11-22 18:15:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:15:30,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:15:30,434 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 17 treesize of output 15 [2023-11-22 18:15:30,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-22 18:15:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:15:30,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622700913] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:15:30,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:15:30,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2023-11-22 18:15:30,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210733512] [2023-11-22 18:15:30,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:15:30,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-22 18:15:30,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:30,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-22 18:15:30,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2023-11-22 18:15:30,452 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 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) [2023-11-22 18:15:30,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:30,588 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2023-11-22 18:15:30,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-22 18:15:30,589 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 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 25 [2023-11-22 18:15:30,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:30,589 INFO L225 Difference]: With dead ends: 43 [2023-11-22 18:15:30,589 INFO L226 Difference]: Without dead ends: 41 [2023-11-22 18:15:30,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2023-11-22 18:15:30,590 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 49 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:30,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 62 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:15:30,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-22 18:15:30,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2023-11-22 18:15:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 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) [2023-11-22 18:15:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-11-22 18:15:30,596 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 25 [2023-11-22 18:15:30,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:30,596 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-11-22 18:15:30,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 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) [2023-11-22 18:15:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-11-22 18:15:30,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-22 18:15:30,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:30,597 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:30,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-22 18:15:30,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-22 18:15:30,812 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:30,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:30,813 INFO L85 PathProgramCache]: Analyzing trace with hash 2092568542, now seen corresponding path program 2 times [2023-11-22 18:15:30,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:30,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442437439] [2023-11-22 18:15:30,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:30,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:15:31,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:31,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442437439] [2023-11-22 18:15:31,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442437439] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:31,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675552003] [2023-11-22 18:15:31,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:15:31,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:31,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:31,112 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) [2023-11-22 18:15:31,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-22 18:15:31,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:15:31,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:15:31,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-22 18:15:31,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:15:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:15:31,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:15:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:15:31,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675552003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:15:31,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:15:31,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-11-22 18:15:31,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763362324] [2023-11-22 18:15:31,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:15:31,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-22 18:15:31,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:31,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-22 18:15:31,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2023-11-22 18:15:31,552 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 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) [2023-11-22 18:15:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:31,747 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2023-11-22 18:15:31,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-22 18:15:31,748 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 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) Word has length 30 [2023-11-22 18:15:31,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:31,749 INFO L225 Difference]: With dead ends: 81 [2023-11-22 18:15:31,749 INFO L226 Difference]: Without dead ends: 44 [2023-11-22 18:15:31,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2023-11-22 18:15:31,750 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 164 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:31,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 73 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-22 18:15:31,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-22 18:15:31,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-11-22 18:15:31,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 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) [2023-11-22 18:15:31,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2023-11-22 18:15:31,756 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 30 [2023-11-22 18:15:31,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:31,757 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2023-11-22 18:15:31,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 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) [2023-11-22 18:15:31,757 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2023-11-22 18:15:31,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-22 18:15:31,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:31,758 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:31,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-22 18:15:31,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:31,976 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:31,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:31,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1602392481, now seen corresponding path program 3 times [2023-11-22 18:15:31,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:31,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174420726] [2023-11-22 18:15:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:31,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 18:15:32,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:32,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174420726] [2023-11-22 18:15:32,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174420726] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:32,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246654919] [2023-11-22 18:15:32,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:15:32,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:32,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:32,557 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) [2023-11-22 18:15:32,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-22 18:15:32,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-22 18:15:32,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:15:32,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-22 18:15:32,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:15:32,714 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 [2023-11-22 18:15:32,734 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:32,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-11-22 18:15:32,786 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 23 treesize of output 22 [2023-11-22 18:15:32,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:32,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:32,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 36 [2023-11-22 18:15:32,881 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-11-22 18:15:32,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2023-11-22 18:15:32,938 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-11-22 18:15:32,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 53 treesize of output 50 [2023-11-22 18:15:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:15:33,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:15:33,697 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 33 [2023-11-22 18:15:33,700 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 43 treesize of output 35 [2023-11-22 18:15:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 18:15:33,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246654919] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:15:33,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:15:33,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 14] total 38 [2023-11-22 18:15:33,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872827796] [2023-11-22 18:15:33,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:15:33,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-22 18:15:33,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:33,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-22 18:15:33,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2023-11-22 18:15:33,867 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 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) [2023-11-22 18:15:34,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:34,875 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2023-11-22 18:15:34,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-22 18:15:34,875 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-22 18:15:34,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:34,876 INFO L225 Difference]: With dead ends: 66 [2023-11-22 18:15:34,876 INFO L226 Difference]: Without dead ends: 57 [2023-11-22 18:15:34,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=615, Invalid=3045, Unknown=0, NotChecked=0, Total=3660 [2023-11-22 18:15:34,877 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 217 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:34,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 109 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 18:15:34,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-22 18:15:34,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2023-11-22 18:15:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 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) [2023-11-22 18:15:34,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2023-11-22 18:15:34,883 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 36 [2023-11-22 18:15:34,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:34,884 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2023-11-22 18:15:34,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 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) [2023-11-22 18:15:34,884 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2023-11-22 18:15:34,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-22 18:15:34,884 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:34,885 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:34,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-22 18:15:35,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:35,100 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:35,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:35,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2015660428, now seen corresponding path program 4 times [2023-11-22 18:15:35,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:35,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472802462] [2023-11-22 18:15:35,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:35,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:15:35,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:35,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472802462] [2023-11-22 18:15:35,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472802462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:35,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963958642] [2023-11-22 18:15:35,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:15:35,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:35,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:35,575 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) [2023-11-22 18:15:35,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-22 18:15:35,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:15:35,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:15:35,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-22 18:15:35,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:15:35,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-22 18:15:35,680 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:35,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2023-11-22 18:15:35,700 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 23 treesize of output 22 [2023-11-22 18:15:35,721 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:35,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 38 treesize of output 34 [2023-11-22 18:15:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:15:35,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:15:36,246 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 83 treesize of output 75 [2023-11-22 18:15:36,251 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:36,251 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 175 treesize of output 143 [2023-11-22 18:15:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 18:15:36,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963958642] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:15:36,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:15:36,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 13] total 37 [2023-11-22 18:15:36,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690690860] [2023-11-22 18:15:36,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:15:36,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-22 18:15:36,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:36,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-22 18:15:36,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2023-11-22 18:15:36,265 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 37 states, 37 states have (on average 2.810810810810811) internal successors, (104), 37 states have internal predecessors, (104), 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) [2023-11-22 18:15:37,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:37,903 INFO L93 Difference]: Finished difference Result 155 states and 173 transitions. [2023-11-22 18:15:37,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-22 18:15:37,904 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.810810810810811) internal successors, (104), 37 states have internal predecessors, (104), 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 [2023-11-22 18:15:37,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:37,906 INFO L225 Difference]: With dead ends: 155 [2023-11-22 18:15:37,906 INFO L226 Difference]: Without dead ends: 130 [2023-11-22 18:15:37,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2590 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1352, Invalid=7390, Unknown=0, NotChecked=0, Total=8742 [2023-11-22 18:15:37,909 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 410 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:37,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 113 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-22 18:15:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-22 18:15:37,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 68. [2023-11-22 18:15:37,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:15:37,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2023-11-22 18:15:37,936 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 41 [2023-11-22 18:15:37,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:37,937 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2023-11-22 18:15:37,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.810810810810811) internal successors, (104), 37 states have internal predecessors, (104), 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) [2023-11-22 18:15:37,937 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2023-11-22 18:15:37,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-22 18:15:37,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:37,943 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:37,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-22 18:15:38,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:38,152 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:38,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:38,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1440232319, now seen corresponding path program 5 times [2023-11-22 18:15:38,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:38,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394878680] [2023-11-22 18:15:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:38,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 18:15:38,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:38,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394878680] [2023-11-22 18:15:38,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394878680] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:38,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475783489] [2023-11-22 18:15:38,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:15:38,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:38,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:38,512 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) [2023-11-22 18:15:38,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-22 18:15:38,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-22 18:15:38,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:15:38,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-22 18:15:38,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:15:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 46 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 18:15:39,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:15:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 46 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-22 18:15:39,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475783489] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:15:39,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:15:39,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2023-11-22 18:15:39,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45972491] [2023-11-22 18:15:39,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:15:39,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-22 18:15:39,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:39,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-22 18:15:39,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2023-11-22 18:15:39,214 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 33 states, 33 states have (on average 3.5757575757575757) internal successors, (118), 33 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) [2023-11-22 18:15:39,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:15:39,475 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2023-11-22 18:15:39,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-22 18:15:39,476 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.5757575757575757) internal successors, (118), 33 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 46 [2023-11-22 18:15:39,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:15:39,477 INFO L225 Difference]: With dead ends: 117 [2023-11-22 18:15:39,477 INFO L226 Difference]: Without dead ends: 67 [2023-11-22 18:15:39,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=418, Invalid=1142, Unknown=0, NotChecked=0, Total=1560 [2023-11-22 18:15:39,478 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 185 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 18:15:39,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 130 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 18:15:39,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-22 18:15:39,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2023-11-22 18:15:39,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.096774193548387) internal successors, (68), 62 states have internal predecessors, (68), 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) [2023-11-22 18:15:39,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2023-11-22 18:15:39,487 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 46 [2023-11-22 18:15:39,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:15:39,487 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2023-11-22 18:15:39,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.5757575757575757) internal successors, (118), 33 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) [2023-11-22 18:15:39,487 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2023-11-22 18:15:39,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-22 18:15:39,488 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:15:39,488 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:15:39,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-22 18:15:39,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:39,696 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:15:39,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:15:39,697 INFO L85 PathProgramCache]: Analyzing trace with hash 5331550, now seen corresponding path program 6 times [2023-11-22 18:15:39,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:15:39,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192005009] [2023-11-22 18:15:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:15:39,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:15:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:15:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:15:40,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:15:40,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192005009] [2023-11-22 18:15:40,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192005009] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:15:40,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477182629] [2023-11-22 18:15:40,472 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:15:40,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:15:40,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:15:40,476 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) [2023-11-22 18:15:40,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-22 18:15:40,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-22 18:15:40,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:15:40,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-22 18:15:40,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:15:40,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-22 18:15:40,674 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:40,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-11-22 18:15:40,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:40,713 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 23 treesize of output 22 [2023-11-22 18:15:40,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:40,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:40,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 36 [2023-11-22 18:15:40,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:40,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:40,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:40,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:40,819 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 34 treesize of output 36 [2023-11-22 18:15:40,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:40,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:40,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:15:40,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:15:40,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 50 [2023-11-22 18:15:43,392 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-22 18:15:43,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:15:46,453 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 92 treesize of output 84 [2023-11-22 18:15:46,457 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 98 treesize of output 94 [2023-11-22 18:15:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-22 18:15:46,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477182629] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:15:46,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:15:46,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 34 [2023-11-22 18:15:46,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592422453] [2023-11-22 18:15:46,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:15:46,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-22 18:15:46,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:15:46,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-22 18:15:46,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=950, Unknown=3, NotChecked=0, Total=1122 [2023-11-22 18:15:46,562 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 34 states have internal predecessors, (104), 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) [2023-11-22 18:15:50,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:15:55,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:16:04,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:04,811 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2023-11-22 18:16:04,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-22 18:16:04,811 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 34 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-11-22 18:16:04,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:04,812 INFO L225 Difference]: With dead ends: 100 [2023-11-22 18:16:04,812 INFO L226 Difference]: Without dead ends: 81 [2023-11-22 18:16:04,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 87 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=759, Invalid=3654, Unknown=9, NotChecked=0, Total=4422 [2023-11-22 18:16:04,814 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 336 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 60 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:04,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 190 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 780 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2023-11-22 18:16:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-22 18:16:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2023-11-22 18:16:04,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 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) [2023-11-22 18:16:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2023-11-22 18:16:04,824 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 52 [2023-11-22 18:16:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:04,824 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2023-11-22 18:16:04,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0588235294117645) internal successors, (104), 34 states have internal predecessors, (104), 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) [2023-11-22 18:16:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2023-11-22 18:16:04,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-22 18:16:04,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:04,825 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:04,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-22 18:16:05,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:05,026 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:05,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:05,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1041674349, now seen corresponding path program 7 times [2023-11-22 18:16:05,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:05,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683990130] [2023-11-22 18:16:05,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:05,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 40 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-22 18:16:05,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:05,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683990130] [2023-11-22 18:16:05,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683990130] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:05,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597624313] [2023-11-22 18:16:05,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:16:05,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:05,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:05,930 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) [2023-11-22 18:16:05,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-22 18:16:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:06,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-22 18:16:06,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:06,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-22 18:16:06,142 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:06,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-11-22 18:16:06,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:06,176 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 23 treesize of output 22 [2023-11-22 18:16:06,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:06,209 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:06,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 36 [2023-11-22 18:16:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-22 18:16:06,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:06,768 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 42 treesize of output 38 [2023-11-22 18:16:06,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-22 18:16:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 40 proven. 33 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-22 18:16:06,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597624313] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:06,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:06,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 13] total 41 [2023-11-22 18:16:06,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93261967] [2023-11-22 18:16:06,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:06,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-22 18:16:06,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:06,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-22 18:16:06,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2023-11-22 18:16:06,850 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 states have internal predecessors, (128), 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) [2023-11-22 18:16:08,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:08,676 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2023-11-22 18:16:08,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-22 18:16:08,680 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 states have internal predecessors, (128), 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 57 [2023-11-22 18:16:08,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:08,681 INFO L225 Difference]: With dead ends: 74 [2023-11-22 18:16:08,681 INFO L226 Difference]: Without dead ends: 60 [2023-11-22 18:16:08,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=539, Invalid=2651, Unknown=2, NotChecked=0, Total=3192 [2023-11-22 18:16:08,683 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 153 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:08,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 213 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 542 Invalid, 1 Unknown, 0 Unchecked, 0.6s Time] [2023-11-22 18:16:08,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-22 18:16:08,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2023-11-22 18:16:08,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 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) [2023-11-22 18:16:08,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2023-11-22 18:16:08,692 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 57 [2023-11-22 18:16:08,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:08,693 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2023-11-22 18:16:08,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.1219512195121952) internal successors, (128), 41 states have internal predecessors, (128), 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) [2023-11-22 18:16:08,693 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2023-11-22 18:16:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-22 18:16:08,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:08,694 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:08,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-22 18:16:08,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-22 18:16:08,904 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:08,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:08,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2052791599, now seen corresponding path program 8 times [2023-11-22 18:16:08,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:08,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125981407] [2023-11-22 18:16:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:08,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:16:09,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:09,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125981407] [2023-11-22 18:16:09,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125981407] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:09,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396222578] [2023-11-22 18:16:09,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:16:09,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:09,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:09,633 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) [2023-11-22 18:16:09,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-22 18:16:09,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:16:09,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:16:09,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-22 18:16:09,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:09,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-22 18:16:09,873 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:09,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-11-22 18:16:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:16:10,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:10,356 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 17 treesize of output 15 [2023-11-22 18:16:10,358 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 16 treesize of output 12 [2023-11-22 18:16:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:16:10,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396222578] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:10,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:10,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 16] total 38 [2023-11-22 18:16:10,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989857137] [2023-11-22 18:16:10,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:10,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-22 18:16:10,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:10,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-22 18:16:10,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1236, Unknown=0, NotChecked=0, Total=1406 [2023-11-22 18:16:10,369 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 38 states have internal predecessors, (134), 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) [2023-11-22 18:16:11,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:11,752 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2023-11-22 18:16:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-22 18:16:11,753 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 38 states have internal predecessors, (134), 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 57 [2023-11-22 18:16:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:11,753 INFO L225 Difference]: With dead ends: 99 [2023-11-22 18:16:11,753 INFO L226 Difference]: Without dead ends: 97 [2023-11-22 18:16:11,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=775, Invalid=5077, Unknown=0, NotChecked=0, Total=5852 [2023-11-22 18:16:11,755 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 224 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:11,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 200 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 18:16:11,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-22 18:16:11,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 63. [2023-11-22 18:16:11,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 states have internal predecessors, (67), 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) [2023-11-22 18:16:11,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2023-11-22 18:16:11,767 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 57 [2023-11-22 18:16:11,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:11,768 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2023-11-22 18:16:11,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.526315789473684) internal successors, (134), 38 states have internal predecessors, (134), 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) [2023-11-22 18:16:11,769 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2023-11-22 18:16:11,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-22 18:16:11,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:11,771 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:11,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-22 18:16:11,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-22 18:16:11,976 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:11,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:11,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2009397570, now seen corresponding path program 9 times [2023-11-22 18:16:11,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:11,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293355605] [2023-11-22 18:16:11,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:11,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 73 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:16:12,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:12,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293355605] [2023-11-22 18:16:12,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293355605] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:12,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016233488] [2023-11-22 18:16:12,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:16:12,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:12,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:12,452 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:16:12,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-22 18:16:12,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-22 18:16:12,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:16:12,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-22 18:16:12,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:12,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-22 18:16:12,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:12,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-22 18:16:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 37 proven. 72 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-22 18:16:12,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:13,160 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 17 treesize of output 15 [2023-11-22 18:16:13,161 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 20 treesize of output 16 [2023-11-22 18:16:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 37 proven. 72 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-22 18:16:13,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016233488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:13,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:13,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2023-11-22 18:16:13,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371081581] [2023-11-22 18:16:13,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:13,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-22 18:16:13,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:13,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-22 18:16:13,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2023-11-22 18:16:13,279 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 39 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 39 states have internal predecessors, (152), 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) [2023-11-22 18:16:14,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:14,743 INFO L93 Difference]: Finished difference Result 179 states and 195 transitions. [2023-11-22 18:16:14,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-22 18:16:14,744 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 39 states have internal predecessors, (152), 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 62 [2023-11-22 18:16:14,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:14,745 INFO L225 Difference]: With dead ends: 179 [2023-11-22 18:16:14,745 INFO L226 Difference]: Without dead ends: 96 [2023-11-22 18:16:14,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1676 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=884, Invalid=5436, Unknown=0, NotChecked=0, Total=6320 [2023-11-22 18:16:14,747 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 499 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:14,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 362 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 18:16:14,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-11-22 18:16:14,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2023-11-22 18:16:14,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 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) [2023-11-22 18:16:14,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2023-11-22 18:16:14,758 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2023-11-22 18:16:14,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:14,759 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2023-11-22 18:16:14,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 39 states have internal predecessors, (152), 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) [2023-11-22 18:16:14,759 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2023-11-22 18:16:14,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-22 18:16:14,760 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:14,760 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:14,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-22 18:16:14,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-22 18:16:14,975 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:14,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:14,975 INFO L85 PathProgramCache]: Analyzing trace with hash 215400069, now seen corresponding path program 10 times [2023-11-22 18:16:14,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:14,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150951623] [2023-11-22 18:16:14,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:14,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:15,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:16,450 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 12 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:16:16,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:16,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150951623] [2023-11-22 18:16:16,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150951623] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:16,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113944674] [2023-11-22 18:16:16,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:16:16,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:16,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:16,452 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:16:16,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-22 18:16:16,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:16:16,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:16:16,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-22 18:16:16,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:16,673 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 1 [2023-11-22 18:16:16,701 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:16,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-22 18:16:16,766 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 23 treesize of output 22 [2023-11-22 18:16:16,797 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:16,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 34 treesize of output 32 [2023-11-22 18:16:16,843 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:16,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2023-11-22 18:16:16,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:16,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 47 treesize of output 46 [2023-11-22 18:16:16,932 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:16,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 41 treesize of output 46 [2023-11-22 18:16:16,986 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:16,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 56 treesize of output 58 [2023-11-22 18:16:17,039 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:17,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 50 treesize of output 58 [2023-11-22 18:16:17,089 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:17,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 65 treesize of output 61 [2023-11-22 18:16:17,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:17,740 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 55 treesize of output 19 [2023-11-22 18:16:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 12 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:16:17,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:18,263 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 [2023-11-22 18:16:18,274 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 24 treesize of output 20 [2023-11-22 18:16:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 12 proven. 109 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 18:16:18,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113944674] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:18,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:18,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 16] total 53 [2023-11-22 18:16:18,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017290811] [2023-11-22 18:16:18,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:18,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-22 18:16:18,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:18,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-22 18:16:18,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2554, Unknown=0, NotChecked=0, Total=2756 [2023-11-22 18:16:18,301 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 53 states, 53 states have (on average 3.207547169811321) internal successors, (170), 53 states have internal predecessors, (170), 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) [2023-11-22 18:16:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:20,363 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2023-11-22 18:16:20,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-22 18:16:20,363 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.207547169811321) internal successors, (170), 53 states have internal predecessors, (170), 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 68 [2023-11-22 18:16:20,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:20,364 INFO L225 Difference]: With dead ends: 107 [2023-11-22 18:16:20,364 INFO L226 Difference]: Without dead ends: 98 [2023-11-22 18:16:20,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 97 SyntacticMatches, 14 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2439 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=742, Invalid=6740, Unknown=0, NotChecked=0, Total=7482 [2023-11-22 18:16:20,366 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 365 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 1607 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:20,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 312 Invalid, 1750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1607 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-22 18:16:20,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-22 18:16:20,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 74. [2023-11-22 18:16:20,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:16:20,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2023-11-22 18:16:20,379 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 68 [2023-11-22 18:16:20,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:20,380 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2023-11-22 18:16:20,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.207547169811321) internal successors, (170), 53 states have internal predecessors, (170), 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) [2023-11-22 18:16:20,380 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2023-11-22 18:16:20,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-22 18:16:20,381 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:20,381 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:20,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-22 18:16:20,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-22 18:16:20,588 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:20,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:20,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1347662322, now seen corresponding path program 11 times [2023-11-22 18:16:20,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:20,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303655499] [2023-11-22 18:16:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:20,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:16:21,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:21,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303655499] [2023-11-22 18:16:21,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303655499] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:21,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465675596] [2023-11-22 18:16:21,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:16:21,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:21,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:21,384 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:16:21,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-22 18:16:21,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-22 18:16:21,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:16:21,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-22 18:16:21,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:21,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-22 18:16:21,722 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:21,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-11-22 18:16:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 18:16:22,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:22,190 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 17 treesize of output 15 [2023-11-22 18:16:22,192 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 16 treesize of output 12 [2023-11-22 18:16:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 18:16:22,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465675596] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:22,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:22,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 17] total 41 [2023-11-22 18:16:22,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037668410] [2023-11-22 18:16:22,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:22,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-22 18:16:22,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:22,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-22 18:16:22,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2023-11-22 18:16:22,204 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 41 states have internal predecessors, (160), 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) [2023-11-22 18:16:24,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:24,122 INFO L93 Difference]: Finished difference Result 157 states and 170 transitions. [2023-11-22 18:16:24,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-22 18:16:24,123 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 41 states have internal predecessors, (160), 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 73 [2023-11-22 18:16:24,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:24,123 INFO L225 Difference]: With dead ends: 157 [2023-11-22 18:16:24,124 INFO L226 Difference]: Without dead ends: 155 [2023-11-22 18:16:24,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3294 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1328, Invalid=9802, Unknown=0, NotChecked=0, Total=11130 [2023-11-22 18:16:24,126 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 320 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:24,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 287 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1755 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-22 18:16:24,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-22 18:16:24,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 79. [2023-11-22 18:16:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.064102564102564) internal successors, (83), 78 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:16:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2023-11-22 18:16:24,140 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 73 [2023-11-22 18:16:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:24,141 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2023-11-22 18:16:24,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 41 states have internal predecessors, (160), 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) [2023-11-22 18:16:24,142 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2023-11-22 18:16:24,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-22 18:16:24,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:24,142 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:24,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-22 18:16:24,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-22 18:16:24,348 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:24,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:24,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2025851941, now seen corresponding path program 12 times [2023-11-22 18:16:24,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:24,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446087390] [2023-11-22 18:16:24,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:24,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 136 proven. 58 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-22 18:16:24,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:24,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446087390] [2023-11-22 18:16:24,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446087390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:24,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258513439] [2023-11-22 18:16:24,936 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:16:24,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:24,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:24,937 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:16:24,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-22 18:16:25,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-22 18:16:25,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:16:25,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-22 18:16:25,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 182 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:16:25,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 172 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-22 18:16:26,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258513439] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:26,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:26,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 20] total 55 [2023-11-22 18:16:26,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276317512] [2023-11-22 18:16:26,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:26,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-22 18:16:26,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:26,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-22 18:16:26,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=698, Invalid=2272, Unknown=0, NotChecked=0, Total=2970 [2023-11-22 18:16:26,205 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 55 states, 55 states have (on average 3.672727272727273) internal successors, (202), 55 states have internal predecessors, (202), 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) [2023-11-22 18:16:26,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:26,755 INFO L93 Difference]: Finished difference Result 196 states and 207 transitions. [2023-11-22 18:16:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-22 18:16:26,756 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.672727272727273) internal successors, (202), 55 states have internal predecessors, (202), 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 78 [2023-11-22 18:16:26,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:26,756 INFO L225 Difference]: With dead ends: 196 [2023-11-22 18:16:26,756 INFO L226 Difference]: Without dead ends: 89 [2023-11-22 18:16:26,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1330, Invalid=4220, Unknown=0, NotChecked=0, Total=5550 [2023-11-22 18:16:26,758 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 310 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:26,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 242 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-22 18:16:26,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-22 18:16:26,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2023-11-22 18:16:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0595238095238095) internal successors, (89), 84 states have internal predecessors, (89), 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) [2023-11-22 18:16:26,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2023-11-22 18:16:26,772 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 78 [2023-11-22 18:16:26,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:26,772 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2023-11-22 18:16:26,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.672727272727273) internal successors, (202), 55 states have internal predecessors, (202), 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) [2023-11-22 18:16:26,772 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2023-11-22 18:16:26,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-22 18:16:26,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:26,773 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:26,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-22 18:16:26,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-22 18:16:26,974 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:26,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:26,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1449714244, now seen corresponding path program 13 times [2023-11-22 18:16:26,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:26,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035388150] [2023-11-22 18:16:26,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:26,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:28,045 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 16 proven. 191 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-22 18:16:28,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:28,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035388150] [2023-11-22 18:16:28,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035388150] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:28,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459475492] [2023-11-22 18:16:28,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:16:28,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:28,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:28,046 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:16:28,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-22 18:16:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:28,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-22 18:16:28,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:28,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-22 18:16:28,361 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:28,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-11-22 18:16:28,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:28,395 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 23 treesize of output 22 [2023-11-22 18:16:28,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:16:28,434 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:28,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 36 [2023-11-22 18:16:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 51 proven. 184 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 18:16:29,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:29,574 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 42 treesize of output 38 [2023-11-22 18:16:29,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-22 18:16:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 51 proven. 154 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-22 18:16:29,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459475492] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:29,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:29,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 54 [2023-11-22 18:16:29,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217678362] [2023-11-22 18:16:29,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:29,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-22 18:16:29,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:29,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-22 18:16:29,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2614, Unknown=0, NotChecked=0, Total=2862 [2023-11-22 18:16:29,753 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 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) [2023-11-22 18:16:32,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:32,922 INFO L93 Difference]: Finished difference Result 151 states and 168 transitions. [2023-11-22 18:16:32,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-22 18:16:32,923 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 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 84 [2023-11-22 18:16:32,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:32,923 INFO L225 Difference]: With dead ends: 151 [2023-11-22 18:16:32,923 INFO L226 Difference]: Without dead ends: 142 [2023-11-22 18:16:32,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 139 SyntacticMatches, 6 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2948 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1239, Invalid=11417, Unknown=0, NotChecked=0, Total=12656 [2023-11-22 18:16:32,925 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 373 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 2715 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 2844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:32,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 655 Invalid, 2844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2715 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-22 18:16:32,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-22 18:16:32,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 90. [2023-11-22 18:16:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:16:32,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2023-11-22 18:16:32,943 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 84 [2023-11-22 18:16:32,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:32,943 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2023-11-22 18:16:32,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 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) [2023-11-22 18:16:32,944 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2023-11-22 18:16:32,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-22 18:16:32,944 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:32,945 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:32,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-22 18:16:33,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:33,161 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:33,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:33,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1419853037, now seen corresponding path program 14 times [2023-11-22 18:16:33,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:33,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453712790] [2023-11-22 18:16:33,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:33,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:16:33,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:33,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453712790] [2023-11-22 18:16:33,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453712790] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:33,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455783089] [2023-11-22 18:16:33,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:16:33,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:33,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:33,867 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:16:33,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-22 18:16:33,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:16:33,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:16:33,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-22 18:16:33,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:34,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-22 18:16:34,220 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:34,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-11-22 18:16:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-22 18:16:34,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:34,945 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 17 treesize of output 15 [2023-11-22 18:16:34,946 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 16 treesize of output 12 [2023-11-22 18:16:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 251 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-22 18:16:34,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455783089] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:34,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:34,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 22] total 44 [2023-11-22 18:16:34,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762837571] [2023-11-22 18:16:34,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:34,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-22 18:16:34,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:34,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-22 18:16:34,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1712, Unknown=0, NotChecked=0, Total=1892 [2023-11-22 18:16:34,961 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 44 states, 44 states have (on average 4.2727272727272725) internal successors, (188), 44 states have internal predecessors, (188), 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) [2023-11-22 18:16:36,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:36,776 INFO L93 Difference]: Finished difference Result 195 states and 211 transitions. [2023-11-22 18:16:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-11-22 18:16:36,776 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.2727272727272725) internal successors, (188), 44 states have internal predecessors, (188), 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 89 [2023-11-22 18:16:36,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:36,777 INFO L225 Difference]: With dead ends: 195 [2023-11-22 18:16:36,777 INFO L226 Difference]: Without dead ends: 193 [2023-11-22 18:16:36,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3408 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=938, Invalid=10404, Unknown=0, NotChecked=0, Total=11342 [2023-11-22 18:16:36,780 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 208 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 2258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:36,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 357 Invalid, 2258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2130 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-22 18:16:36,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-11-22 18:16:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 95. [2023-11-22 18:16:36,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.053191489361702) internal successors, (99), 94 states have internal predecessors, (99), 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) [2023-11-22 18:16:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2023-11-22 18:16:36,798 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 89 [2023-11-22 18:16:36,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:36,798 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2023-11-22 18:16:36,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.2727272727272725) internal successors, (188), 44 states have internal predecessors, (188), 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) [2023-11-22 18:16:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2023-11-22 18:16:36,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-22 18:16:36,799 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:36,799 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:36,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-22 18:16:36,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:36,999 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:37,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:37,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1782091942, now seen corresponding path program 15 times [2023-11-22 18:16:37,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:37,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558371037] [2023-11-22 18:16:37,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:37,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 219 proven. 81 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-22 18:16:37,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:37,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558371037] [2023-11-22 18:16:37,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558371037] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:37,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312819474] [2023-11-22 18:16:37,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:16:37,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:37,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:37,657 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:16:37,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-22 18:16:37,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-22 18:16:37,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:16:37,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-22 18:16:37,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:38,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-22 18:16:38,137 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:38,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-22 18:16:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 65 proven. 233 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-22 18:16:38,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:38,862 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 17 treesize of output 15 [2023-11-22 18:16:38,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-22 18:16:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 65 proven. 233 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-22 18:16:39,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312819474] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:39,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:39,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 20] total 57 [2023-11-22 18:16:39,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930706852] [2023-11-22 18:16:39,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:39,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-22 18:16:39,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:39,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-22 18:16:39,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2913, Unknown=0, NotChecked=0, Total=3192 [2023-11-22 18:16:39,049 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 57 states, 57 states have (on average 4.035087719298246) internal successors, (230), 57 states have internal predecessors, (230), 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) [2023-11-22 18:16:42,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:42,413 INFO L93 Difference]: Finished difference Result 321 states and 343 transitions. [2023-11-22 18:16:42,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-22 18:16:42,413 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 4.035087719298246) internal successors, (230), 57 states have internal predecessors, (230), 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 94 [2023-11-22 18:16:42,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:42,414 INFO L225 Difference]: With dead ends: 321 [2023-11-22 18:16:42,414 INFO L226 Difference]: Without dead ends: 192 [2023-11-22 18:16:42,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5475 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1871, Invalid=16489, Unknown=0, NotChecked=0, Total=18360 [2023-11-22 18:16:42,417 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1015 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 2352 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 2688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 2352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:42,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 826 Invalid, 2688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 2352 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-22 18:16:42,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-11-22 18:16:42,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 101. [2023-11-22 18:16:42,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 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) [2023-11-22 18:16:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2023-11-22 18:16:42,440 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 94 [2023-11-22 18:16:42,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:42,440 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2023-11-22 18:16:42,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 4.035087719298246) internal successors, (230), 57 states have internal predecessors, (230), 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) [2023-11-22 18:16:42,441 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2023-11-22 18:16:42,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-11-22 18:16:42,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:42,441 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:42,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-22 18:16:42,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:42,652 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:42,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:42,653 INFO L85 PathProgramCache]: Analyzing trace with hash -48075095, now seen corresponding path program 16 times [2023-11-22 18:16:42,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:42,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063396708] [2023-11-22 18:16:42,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:42,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 20 proven. 296 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:16:43,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:43,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063396708] [2023-11-22 18:16:43,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063396708] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:43,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935381759] [2023-11-22 18:16:43,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:16:43,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:43,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:43,938 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:16:43,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-22 18:16:44,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:16:44,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:16:44,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-22 18:16:44,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:44,218 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 1 [2023-11-22 18:16:44,245 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:44,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-22 18:16:44,300 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 23 treesize of output 22 [2023-11-22 18:16:44,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:44,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 34 treesize of output 32 [2023-11-22 18:16:44,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:44,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2023-11-22 18:16:44,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:44,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 47 treesize of output 46 [2023-11-22 18:16:44,458 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:44,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 41 treesize of output 46 [2023-11-22 18:16:44,504 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:44,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 56 treesize of output 58 [2023-11-22 18:16:44,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:44,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 50 treesize of output 58 [2023-11-22 18:16:44,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:44,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 70 [2023-11-22 18:16:44,672 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:44,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 59 treesize of output 70 [2023-11-22 18:16:44,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:44,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 74 treesize of output 82 [2023-11-22 18:16:44,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:44,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 82 [2023-11-22 18:16:44,936 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:44,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 83 treesize of output 85 [2023-11-22 18:16:46,231 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:46,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 73 treesize of output 25 [2023-11-22 18:16:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 20 proven. 347 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:16:46,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:47,034 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 [2023-11-22 18:16:47,037 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 24 treesize of output 20 [2023-11-22 18:16:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 20 proven. 296 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:16:47,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935381759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:47,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:47,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 35, 22] total 66 [2023-11-22 18:16:47,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093426478] [2023-11-22 18:16:47,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:47,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-11-22 18:16:47,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:47,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-11-22 18:16:47,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4049, Unknown=0, NotChecked=0, Total=4290 [2023-11-22 18:16:47,080 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 66 states, 66 states have (on average 3.621212121212121) internal successors, (239), 66 states have internal predecessors, (239), 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) [2023-11-22 18:16:50,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:50,520 INFO L93 Difference]: Finished difference Result 155 states and 168 transitions. [2023-11-22 18:16:50,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-22 18:16:50,521 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.621212121212121) internal successors, (239), 66 states have internal predecessors, (239), 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 100 [2023-11-22 18:16:50,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:50,521 INFO L225 Difference]: With dead ends: 155 [2023-11-22 18:16:50,521 INFO L226 Difference]: Without dead ends: 146 [2023-11-22 18:16:50,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 149 SyntacticMatches, 21 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4065 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=864, Invalid=12018, Unknown=0, NotChecked=0, Total=12882 [2023-11-22 18:16:50,523 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 333 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 3794 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 3921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 3794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:50,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 739 Invalid, 3921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 3794 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-22 18:16:50,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-22 18:16:50,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 106. [2023-11-22 18:16:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 states have internal predecessors, (109), 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) [2023-11-22 18:16:50,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2023-11-22 18:16:50,548 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 100 [2023-11-22 18:16:50,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:50,549 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2023-11-22 18:16:50,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.621212121212121) internal successors, (239), 66 states have internal predecessors, (239), 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) [2023-11-22 18:16:50,549 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2023-11-22 18:16:50,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-22 18:16:50,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:50,550 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:50,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-22 18:16:50,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:50,766 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:50,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:50,766 INFO L85 PathProgramCache]: Analyzing trace with hash -929229718, now seen corresponding path program 17 times [2023-11-22 18:16:50,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:50,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043231140] [2023-11-22 18:16:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:50,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:16:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:16:52,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:16:52,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043231140] [2023-11-22 18:16:52,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043231140] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:16:52,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707216496] [2023-11-22 18:16:52,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:16:52,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:52,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:16:52,052 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:16:52,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-22 18:16:52,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-22 18:16:52,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:16:52,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-22 18:16:52,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:16:53,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-22 18:16:53,194 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:16:53,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-11-22 18:16:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:16:53,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:16:54,030 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 17 treesize of output 15 [2023-11-22 18:16:54,031 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 16 treesize of output 12 [2023-11-22 18:16:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:16:54,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707216496] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:16:54,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:16:54,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 25, 24] total 57 [2023-11-22 18:16:54,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368041788] [2023-11-22 18:16:54,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:16:54,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-22 18:16:54,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:16:54,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-22 18:16:54,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=2940, Unknown=0, NotChecked=0, Total=3192 [2023-11-22 18:16:54,050 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand has 57 states, 57 states have (on average 3.9649122807017543) internal successors, (226), 57 states have internal predecessors, (226), 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) [2023-11-22 18:16:59,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:16:59,164 INFO L93 Difference]: Finished difference Result 273 states and 292 transitions. [2023-11-22 18:16:59,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2023-11-22 18:16:59,165 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.9649122807017543) internal successors, (226), 57 states have internal predecessors, (226), 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 105 [2023-11-22 18:16:59,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:16:59,169 INFO L225 Difference]: With dead ends: 273 [2023-11-22 18:16:59,169 INFO L226 Difference]: Without dead ends: 271 [2023-11-22 18:16:59,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10721 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2833, Invalid=29747, Unknown=0, NotChecked=0, Total=32580 [2023-11-22 18:16:59,173 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 717 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 3328 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 3618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 3328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-22 18:16:59,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 473 Invalid, 3618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 3328 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-22 18:16:59,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2023-11-22 18:16:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 111. [2023-11-22 18:16:59,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0454545454545454) internal successors, (115), 110 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:16:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2023-11-22 18:16:59,201 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 105 [2023-11-22 18:16:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:16:59,201 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2023-11-22 18:16:59,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.9649122807017543) internal successors, (226), 57 states have internal predecessors, (226), 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) [2023-11-22 18:16:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2023-11-22 18:16:59,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-22 18:16:59,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:16:59,207 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:16:59,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-22 18:16:59,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:16:59,414 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:16:59,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:16:59,415 INFO L85 PathProgramCache]: Analyzing trace with hash -229056695, now seen corresponding path program 18 times [2023-11-22 18:16:59,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:16:59,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282996207] [2023-11-22 18:16:59,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:16:59,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:16:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 322 proven. 107 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:17:00,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:17:00,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282996207] [2023-11-22 18:17:00,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282996207] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:17:00,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89631230] [2023-11-22 18:17:00,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:17:00,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:17:00,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:17:00,281 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:17:00,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-22 18:17:00,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-11-22 18:17:00,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:17:00,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-22 18:17:00,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:17:01,947 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 378 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:17:01,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:17:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 378 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-22 18:17:02,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89631230] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:17:02,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:17:02,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 24] total 70 [2023-11-22 18:17:02,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322826312] [2023-11-22 18:17:02,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:17:02,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-11-22 18:17:02,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:17:02,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-11-22 18:17:02,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2023-11-22 18:17:02,478 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 70 states, 70 states have (on average 3.9285714285714284) internal successors, (275), 70 states have internal predecessors, (275), 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) [2023-11-22 18:17:02,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:17:02,999 INFO L93 Difference]: Finished difference Result 274 states and 285 transitions. [2023-11-22 18:17:03,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-22 18:17:03,000 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.9285714285714284) internal successors, (275), 70 states have internal predecessors, (275), 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 110 [2023-11-22 18:17:03,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:17:03,004 INFO L225 Difference]: With dead ends: 274 [2023-11-22 18:17:03,004 INFO L226 Difference]: Without dead ends: 121 [2023-11-22 18:17:03,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2634 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1500, Invalid=4980, Unknown=0, NotChecked=0, Total=6480 [2023-11-22 18:17:03,006 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 359 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:17:03,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 292 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 18:17:03,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-22 18:17:03,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2023-11-22 18:17:03,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.043103448275862) internal successors, (121), 116 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 18:17:03,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2023-11-22 18:17:03,040 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 110 [2023-11-22 18:17:03,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:17:03,040 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2023-11-22 18:17:03,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.9285714285714284) internal successors, (275), 70 states have internal predecessors, (275), 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) [2023-11-22 18:17:03,040 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2023-11-22 18:17:03,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-22 18:17:03,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:17:03,041 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:17:03,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-22 18:17:03,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:17:03,241 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:17:03,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:17:03,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1731668824, now seen corresponding path program 19 times [2023-11-22 18:17:03,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:17:03,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712886252] [2023-11-22 18:17:03,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:17:03,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:17:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 80 proven. 435 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 18:17:04,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:17:04,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712886252] [2023-11-22 18:17:04,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712886252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:17:04,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573219297] [2023-11-22 18:17:04,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:17:04,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:17:04,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:17:04,436 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:17:04,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-22 18:17:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:04,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-22 18:17:04,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:17:04,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-22 18:17:04,881 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:04,881 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-11-22 18:17:04,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:04,918 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 23 treesize of output 22 [2023-11-22 18:17:04,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:17:04,953 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:04,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 36 [2023-11-22 18:17:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 79 proven. 432 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 18:17:06,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:17:07,440 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 42 treesize of output 38 [2023-11-22 18:17:07,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-22 18:17:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 79 proven. 367 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-22 18:17:07,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573219297] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:17:07,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:17:07,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 25] total 70 [2023-11-22 18:17:07,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001492051] [2023-11-22 18:17:07,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:17:07,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-11-22 18:17:07,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:17:07,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-11-22 18:17:07,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=4456, Unknown=1, NotChecked=0, Total=4830 [2023-11-22 18:17:07,787 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 70 states, 70 states have (on average 4.371428571428571) internal successors, (306), 70 states have internal predecessors, (306), 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) [2023-11-22 18:17:14,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:17:16,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:17:21,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-22 18:17:29,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:17:29,386 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2023-11-22 18:17:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-22 18:17:29,387 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 4.371428571428571) internal successors, (306), 70 states have internal predecessors, (306), 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 116 [2023-11-22 18:17:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:17:29,389 INFO L225 Difference]: With dead ends: 147 [2023-11-22 18:17:29,389 INFO L226 Difference]: Without dead ends: 138 [2023-11-22 18:17:29,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3431 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=1048, Invalid=11376, Unknown=8, NotChecked=0, Total=12432 [2023-11-22 18:17:29,392 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 170 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 2692 mSolverCounterSat, 69 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 2764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2692 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:17:29,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 1097 Invalid, 2764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2692 Invalid, 3 Unknown, 0 Unchecked, 7.3s Time] [2023-11-22 18:17:29,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-22 18:17:29,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 117. [2023-11-22 18:17:29,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 states have internal predecessors, (120), 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) [2023-11-22 18:17:29,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2023-11-22 18:17:29,439 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 116 [2023-11-22 18:17:29,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:17:29,439 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2023-11-22 18:17:29,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 4.371428571428571) internal successors, (306), 70 states have internal predecessors, (306), 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) [2023-11-22 18:17:29,440 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2023-11-22 18:17:29,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-22 18:17:29,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:17:29,441 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:17:29,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-22 18:17:29,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-22 18:17:29,650 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:17:29,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:17:29,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1051610454, now seen corresponding path program 20 times [2023-11-22 18:17:29,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:17:29,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179841510] [2023-11-22 18:17:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:17:29,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:17:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 24 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:17:33,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:17:33,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179841510] [2023-11-22 18:17:33,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179841510] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:17:33,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043616872] [2023-11-22 18:17:33,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:17:33,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:17:33,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:17:33,051 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:17:33,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-22 18:17:33,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:17:33,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:17:33,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-22 18:17:33,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:17:33,583 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 [2023-11-22 18:17:33,613 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:33,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-11-22 18:17:33,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-22 18:17:33,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:33,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2023-11-22 18:17:33,754 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:33,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-11-22 18:17:33,806 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:33,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 38 [2023-11-22 18:17:33,888 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:33,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-11-22 18:17:33,958 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:33,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 44 treesize of output 48 [2023-11-22 18:17:34,023 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:34,023 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 40 treesize of output 48 [2023-11-22 18:17:34,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:34,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 58 [2023-11-22 18:17:34,194 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:34,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-11-22 18:17:34,281 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:34,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 58 treesize of output 68 [2023-11-22 18:17:34,379 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:34,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-11-22 18:17:34,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:34,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 65 treesize of output 78 [2023-11-22 18:17:34,568 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:34,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2023-11-22 18:17:34,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:34,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 72 treesize of output 81 [2023-11-22 18:17:36,896 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:36,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 64 treesize of output 28 [2023-11-22 18:17:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 24 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:17:36,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:17:38,023 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 [2023-11-22 18:17:38,026 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 24 treesize of output 20 [2023-11-22 18:17:38,457 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 24 proven. 424 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 18:17:38,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043616872] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:17:38,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:17:38,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 40, 25] total 96 [2023-11-22 18:17:38,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416670548] [2023-11-22 18:17:38,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:17:38,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-11-22 18:17:38,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:17:38,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-11-22 18:17:38,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=8600, Unknown=0, NotChecked=0, Total=9120 [2023-11-22 18:17:38,461 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 96 states, 96 states have (on average 3.34375) internal successors, (321), 96 states have internal predecessors, (321), 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) [2023-11-22 18:17:50,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:17:50,940 INFO L93 Difference]: Finished difference Result 377 states and 406 transitions. [2023-11-22 18:17:50,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-11-22 18:17:50,942 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.34375) internal successors, (321), 96 states have internal predecessors, (321), 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 116 [2023-11-22 18:17:50,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:17:50,944 INFO L225 Difference]: With dead ends: 377 [2023-11-22 18:17:50,944 INFO L226 Difference]: Without dead ends: 368 [2023-11-22 18:17:50,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 159 SyntacticMatches, 20 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20022 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=4086, Invalid=53754, Unknown=0, NotChecked=0, Total=57840 [2023-11-22 18:17:50,948 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1280 mSDsluCounter, 1058 mSDsCounter, 0 mSdLazyCounter, 7615 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1280 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 8247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 7615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:17:50,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1280 Valid, 1092 Invalid, 8247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 7615 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-22 18:17:50,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-11-22 18:17:50,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 122. [2023-11-22 18:17:50,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0330578512396693) internal successors, (125), 121 states have internal predecessors, (125), 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) [2023-11-22 18:17:50,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2023-11-22 18:17:50,975 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 116 [2023-11-22 18:17:50,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:17:50,976 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2023-11-22 18:17:50,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.34375) internal successors, (321), 96 states have internal predecessors, (321), 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) [2023-11-22 18:17:50,976 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2023-11-22 18:17:50,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-22 18:17:50,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:17:50,976 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:17:50,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-22 18:17:51,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-22 18:17:51,177 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:17:51,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:17:51,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1426925833, now seen corresponding path program 21 times [2023-11-22 18:17:51,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:17:51,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920804741] [2023-11-22 18:17:51,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:17:51,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:17:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 0 proven. 582 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:17:52,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:17:52,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920804741] [2023-11-22 18:17:52,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920804741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:17:52,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453519017] [2023-11-22 18:17:52,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:17:52,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:17:52,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:17:52,159 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:17:52,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-22 18:17:52,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-11-22 18:17:52,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:17:52,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-22 18:17:52,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:17:52,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-22 18:17:52,855 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:17:52,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-22 18:17:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 18:17:53,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:17:53,582 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 17 treesize of output 15 [2023-11-22 18:17:53,588 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 16 treesize of output 12 [2023-11-22 18:17:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 0 proven. 512 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 18:17:53,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453519017] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:17:53,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:17:53,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 45 [2023-11-22 18:17:53,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564053343] [2023-11-22 18:17:53,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:17:53,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-22 18:17:53,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:17:53,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-22 18:17:53,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1838, Unknown=0, NotChecked=0, Total=1980 [2023-11-22 18:17:53,608 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand has 45 states, 45 states have (on average 4.466666666666667) internal successors, (201), 45 states have internal predecessors, (201), 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) [2023-11-22 18:17:57,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:17:57,426 INFO L93 Difference]: Finished difference Result 321 states and 343 transitions. [2023-11-22 18:17:57,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2023-11-22 18:17:57,426 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.466666666666667) internal successors, (201), 45 states have internal predecessors, (201), 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 121 [2023-11-22 18:17:57,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:17:57,427 INFO L225 Difference]: With dead ends: 321 [2023-11-22 18:17:57,427 INFO L226 Difference]: Without dead ends: 319 [2023-11-22 18:17:57,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8764 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1463, Invalid=24619, Unknown=0, NotChecked=0, Total=26082 [2023-11-22 18:17:57,431 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 270 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 4180 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 4412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 4180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-22 18:17:57,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 652 Invalid, 4412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 4180 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-22 18:17:57,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-11-22 18:17:57,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 127. [2023-11-22 18:17:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0396825396825398) internal successors, (131), 126 states have internal predecessors, (131), 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) [2023-11-22 18:17:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2023-11-22 18:17:57,467 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 121 [2023-11-22 18:17:57,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:17:57,468 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2023-11-22 18:17:57,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.466666666666667) internal successors, (201), 45 states have internal predecessors, (201), 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) [2023-11-22 18:17:57,468 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2023-11-22 18:17:57,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-22 18:17:57,469 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:17:57,469 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:17:57,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-22 18:17:57,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-22 18:17:57,686 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:17:57,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:17:57,686 INFO L85 PathProgramCache]: Analyzing trace with hash -601369078, now seen corresponding path program 22 times [2023-11-22 18:17:57,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:17:57,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012877143] [2023-11-22 18:17:57,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:17:57,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:17:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:17:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 445 proven. 136 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 18:17:58,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:17:58,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012877143] [2023-11-22 18:17:58,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012877143] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:17:58,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694072378] [2023-11-22 18:17:58,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:17:58,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:17:58,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:17:58,626 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:17:58,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-22 18:17:58,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:17:58,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:17:58,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-22 18:17:58,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:17:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 511 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 18:17:59,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:18:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 511 proven. 70 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-22 18:18:00,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694072378] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:18:00,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:18:00,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 78 [2023-11-22 18:18:00,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658073927] [2023-11-22 18:18:00,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:18:00,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-11-22 18:18:00,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:18:00,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-11-22 18:18:00,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1214, Invalid=4792, Unknown=0, NotChecked=0, Total=6006 [2023-11-22 18:18:00,572 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 78 states, 78 states have (on average 4.012820512820513) internal successors, (313), 78 states have internal predecessors, (313), 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) [2023-11-22 18:18:01,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:18:01,539 INFO L93 Difference]: Finished difference Result 313 states and 324 transitions. [2023-11-22 18:18:01,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-22 18:18:01,539 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 4.012820512820513) internal successors, (313), 78 states have internal predecessors, (313), 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 126 [2023-11-22 18:18:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:18:01,540 INFO L225 Difference]: With dead ends: 313 [2023-11-22 18:18:01,540 INFO L226 Difference]: Without dead ends: 137 [2023-11-22 18:18:01,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4064 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2288, Invalid=8632, Unknown=0, NotChecked=0, Total=10920 [2023-11-22 18:18:01,541 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 754 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-22 18:18:01,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 353 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-22 18:18:01,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-22 18:18:01,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2023-11-22 18:18:01,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0378787878787878) internal successors, (137), 132 states have internal predecessors, (137), 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) [2023-11-22 18:18:01,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2023-11-22 18:18:01,572 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 126 [2023-11-22 18:18:01,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:18:01,572 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2023-11-22 18:18:01,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 4.012820512820513) internal successors, (313), 78 states have internal predecessors, (313), 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) [2023-11-22 18:18:01,572 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2023-11-22 18:18:01,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-22 18:18:01,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:18:01,573 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:18:01,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-22 18:18:01,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:18:01,780 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:18:01,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:18:01,781 INFO L85 PathProgramCache]: Analyzing trace with hash 6258379, now seen corresponding path program 23 times [2023-11-22 18:18:01,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:18:01,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848706529] [2023-11-22 18:18:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:18:01,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:18:01,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:18:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 28 proven. 575 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-22 18:18:03,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:18:03,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848706529] [2023-11-22 18:18:03,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848706529] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:18:03,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054369054] [2023-11-22 18:18:03,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:18:03,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:18:03,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:18:03,671 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:18:03,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-22 18:18:04,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-11-22 18:18:04,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:18:04,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-22 18:18:04,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:18:04,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-22 18:18:04,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:18:04,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-22 18:18:04,868 INFO L349 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-11-22 18:18:04,868 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 26 treesize of output 25 [2023-11-22 18:18:04,909 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 18:18:04,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 47 treesize of output 40 [2023-11-22 18:18:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 93 proven. 508 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-22 18:18:06,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:18:07,894 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 42 treesize of output 38 [2023-11-22 18:18:07,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-22 18:18:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 695 backedges. 93 proven. 508 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-11-22 18:18:08,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054369054] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:18:08,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:18:08,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 28] total 81 [2023-11-22 18:18:08,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025844075] [2023-11-22 18:18:08,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:18:08,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-11-22 18:18:08,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:18:08,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-11-22 18:18:08,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=6066, Unknown=1, NotChecked=0, Total=6480 [2023-11-22 18:18:08,263 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand has 81 states, 81 states have (on average 3.925925925925926) internal successors, (318), 81 states have internal predecessors, (318), 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) [2023-11-22 18:18:18,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:18:18,372 INFO L93 Difference]: Finished difference Result 357 states and 386 transitions. [2023-11-22 18:18:18,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2023-11-22 18:18:18,372 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.925925925925926) internal successors, (318), 81 states have internal predecessors, (318), 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 132 [2023-11-22 18:18:18,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:18:18,374 INFO L225 Difference]: With dead ends: 357 [2023-11-22 18:18:18,374 INFO L226 Difference]: Without dead ends: 348 [2023-11-22 18:18:18,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 216 SyntacticMatches, 13 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12577 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=2938, Invalid=42217, Unknown=1, NotChecked=0, Total=45156 [2023-11-22 18:18:18,377 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 849 mSDsluCounter, 1678 mSDsCounter, 0 mSdLazyCounter, 7208 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 7560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 7208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-22 18:18:18,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 1720 Invalid, 7560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 7208 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-22 18:18:18,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-22 18:18:18,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 138. [2023-11-22 18:18:18,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0291970802919708) internal successors, (141), 137 states have internal predecessors, (141), 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) [2023-11-22 18:18:18,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2023-11-22 18:18:18,427 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 132 [2023-11-22 18:18:18,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:18:18,427 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2023-11-22 18:18:18,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.925925925925926) internal successors, (318), 81 states have internal predecessors, (318), 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) [2023-11-22 18:18:18,428 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2023-11-22 18:18:18,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-22 18:18:18,429 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:18:18,429 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:18:18,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-22 18:18:18,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-22 18:18:18,632 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:18:18,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:18:18,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1899340602, now seen corresponding path program 24 times [2023-11-22 18:18:18,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:18:18,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002168311] [2023-11-22 18:18:18,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:18:18,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:18:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:18:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 769 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:18:20,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:18:20,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002168311] [2023-11-22 18:18:20,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002168311] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:18:20,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641525617] [2023-11-22 18:18:20,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-22 18:18:20,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:18:20,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:18:20,445 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:18:20,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-22 18:18:21,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2023-11-22 18:18:21,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:18:21,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-22 18:18:21,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:18:21,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-22 18:18:21,162 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:18:21,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-22 18:18:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 677 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-22 18:18:21,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:18:22,085 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 17 treesize of output 15 [2023-11-22 18:18:22,087 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 16 treesize of output 12 [2023-11-22 18:18:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 677 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-22 18:18:22,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641525617] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:18:22,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:18:22,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 30, 30] total 60 [2023-11-22 18:18:22,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783133477] [2023-11-22 18:18:22,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:18:22,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-22 18:18:22,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:18:22,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-22 18:18:22,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=3304, Unknown=0, NotChecked=0, Total=3540 [2023-11-22 18:18:22,109 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 60 states, 60 states have (on average 4.216666666666667) internal successors, (253), 60 states have internal predecessors, (253), 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) [2023-11-22 18:18:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:18:30,234 INFO L93 Difference]: Finished difference Result 419 states and 444 transitions. [2023-11-22 18:18:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2023-11-22 18:18:30,235 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 4.216666666666667) internal successors, (253), 60 states have internal predecessors, (253), 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 137 [2023-11-22 18:18:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:18:30,236 INFO L225 Difference]: With dead ends: 419 [2023-11-22 18:18:30,236 INFO L226 Difference]: Without dead ends: 417 [2023-11-22 18:18:30,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22363 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4029, Invalid=59223, Unknown=0, NotChecked=0, Total=63252 [2023-11-22 18:18:30,241 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 944 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 5344 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 5745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 5344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-22 18:18:30,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [944 Valid, 729 Invalid, 5745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 5344 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-22 18:18:30,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2023-11-22 18:18:30,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 143. [2023-11-22 18:18:30,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0352112676056338) internal successors, (147), 142 states have internal predecessors, (147), 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) [2023-11-22 18:18:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2023-11-22 18:18:30,288 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 137 [2023-11-22 18:18:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:18:30,288 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2023-11-22 18:18:30,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 4.216666666666667) internal successors, (253), 60 states have internal predecessors, (253), 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) [2023-11-22 18:18:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2023-11-22 18:18:30,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-22 18:18:30,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:18:30,290 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:18:30,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-22 18:18:30,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-22 18:18:30,496 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:18:30,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:18:30,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2050388077, now seen corresponding path program 25 times [2023-11-22 18:18:30,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:18:30,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889665475] [2023-11-22 18:18:30,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:18:30,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:18:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:18:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 588 proven. 168 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-22 18:18:31,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:18:31,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889665475] [2023-11-22 18:18:31,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889665475] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:18:31,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551632426] [2023-11-22 18:18:31,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-22 18:18:31,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:18:31,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:18:31,533 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:18:31,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-22 18:18:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:18:31,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-22 18:18:31,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:18:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 664 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-22 18:18:33,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:18:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 848 backedges. 664 proven. 92 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-11-22 18:18:33,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551632426] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:18:33,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:18:33,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 30] total 88 [2023-11-22 18:18:33,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175517590] [2023-11-22 18:18:33,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:18:33,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-11-22 18:18:33,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:18:33,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-11-22 18:18:33,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1698, Invalid=5958, Unknown=0, NotChecked=0, Total=7656 [2023-11-22 18:18:33,855 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand has 88 states, 88 states have (on average 4.011363636363637) internal successors, (353), 88 states have internal predecessors, (353), 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) [2023-11-22 18:18:34,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:18:34,703 INFO L93 Difference]: Finished difference Result 352 states and 363 transitions. [2023-11-22 18:18:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-22 18:18:34,704 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 4.011363636363637) internal successors, (353), 88 states have internal predecessors, (353), 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 142 [2023-11-22 18:18:34,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:18:34,705 INFO L225 Difference]: With dead ends: 352 [2023-11-22 18:18:34,705 INFO L226 Difference]: Without dead ends: 153 [2023-11-22 18:18:34,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4294 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2277, Invalid=7823, Unknown=0, NotChecked=0, Total=10100 [2023-11-22 18:18:34,707 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 514 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 18:18:34,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 457 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 18:18:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-22 18:18:34,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2023-11-22 18:18:34,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0337837837837838) internal successors, (153), 148 states have internal predecessors, (153), 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) [2023-11-22 18:18:34,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 153 transitions. [2023-11-22 18:18:34,762 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 153 transitions. Word has length 142 [2023-11-22 18:18:34,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:18:34,762 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 153 transitions. [2023-11-22 18:18:34,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 4.011363636363637) internal successors, (353), 88 states have internal predecessors, (353), 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) [2023-11-22 18:18:34,763 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 153 transitions. [2023-11-22 18:18:34,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-22 18:18:34,763 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:18:34,764 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:18:34,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-22 18:18:34,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:18:34,979 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:18:34,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:18:34,979 INFO L85 PathProgramCache]: Analyzing trace with hash 395900172, now seen corresponding path program 26 times [2023-11-22 18:18:34,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:18:34,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638413172] [2023-11-22 18:18:34,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:18:34,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:18:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:18:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 32 proven. 749 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-22 18:18:37,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:18:37,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638413172] [2023-11-22 18:18:37,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638413172] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:18:37,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311835621] [2023-11-22 18:18:37,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-22 18:18:37,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:18:37,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:18:37,099 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:18:37,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-22 18:18:37,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-22 18:18:37,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:18:37,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-22 18:18:37,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:18:37,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-22 18:18:37,761 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:18:37,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2023-11-22 18:18:37,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:18:37,809 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 23 treesize of output 22 [2023-11-22 18:18:37,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-22 18:18:37,861 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:18:37,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 36 [2023-11-22 18:18:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 107 proven. 784 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-22 18:18:39,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:18:41,142 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 42 treesize of output 38 [2023-11-22 18:18:41,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-22 18:18:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 898 backedges. 107 proven. 672 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2023-11-22 18:18:41,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311835621] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:18:41,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:18:41,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 31] total 90 [2023-11-22 18:18:41,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995826317] [2023-11-22 18:18:41,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:18:41,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-11-22 18:18:41,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:18:41,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-11-22 18:18:41,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=7586, Unknown=1, NotChecked=0, Total=8010 [2023-11-22 18:18:41,687 INFO L87 Difference]: Start difference. First operand 149 states and 153 transitions. Second operand has 90 states, 90 states have (on average 4.2) internal successors, (378), 90 states have internal predecessors, (378), 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) [2023-11-22 18:18:54,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:18:54,586 INFO L93 Difference]: Finished difference Result 409 states and 442 transitions. [2023-11-22 18:18:54,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2023-11-22 18:18:54,586 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 4.2) internal successors, (378), 90 states have internal predecessors, (378), 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 148 [2023-11-22 18:18:54,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:18:54,588 INFO L225 Difference]: With dead ends: 409 [2023-11-22 18:18:54,588 INFO L226 Difference]: Without dead ends: 400 [2023-11-22 18:18:54,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 242 SyntacticMatches, 15 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16458 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=3605, Invalid=56664, Unknown=1, NotChecked=0, Total=60270 [2023-11-22 18:18:54,591 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 1116 mSDsluCounter, 2215 mSDsCounter, 0 mSdLazyCounter, 9258 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 2262 SdHoareTripleChecker+Invalid, 9708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 9258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-22 18:18:54,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 2262 Invalid, 9708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 9258 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-22 18:18:54,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-11-22 18:18:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 154. [2023-11-22 18:18:54,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.026143790849673) internal successors, (157), 153 states have internal predecessors, (157), 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) [2023-11-22 18:18:54,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2023-11-22 18:18:54,641 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 148 [2023-11-22 18:18:54,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:18:54,641 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2023-11-22 18:18:54,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 4.2) internal successors, (378), 90 states have internal predecessors, (378), 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) [2023-11-22 18:18:54,642 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2023-11-22 18:18:54,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-22 18:18:54,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:18:54,643 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:18:54,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-22 18:18:54,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:18:54,848 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:18:54,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:18:54,849 INFO L85 PathProgramCache]: Analyzing trace with hash -571103451, now seen corresponding path program 27 times [2023-11-22 18:18:54,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:18:54,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143079937] [2023-11-22 18:18:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:18:54,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:18:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:18:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 0 proven. 982 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 18:18:56,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:18:56,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143079937] [2023-11-22 18:18:56,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143079937] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:18:56,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339781965] [2023-11-22 18:18:56,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-22 18:18:56,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:18:56,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:18:56,162 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:18:56,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-22 18:18:57,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-11-22 18:18:57,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:18:57,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-22 18:18:57,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:18:57,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-22 18:18:57,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:18:57,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-22 18:18:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 0 proven. 865 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-22 18:18:58,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:18:58,728 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 17 treesize of output 15 [2023-11-22 18:18:58,730 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 16 treesize of output 12 [2023-11-22 18:18:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 0 proven. 865 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-22 18:18:58,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339781965] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:18:58,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:18:58,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 55 [2023-11-22 18:18:58,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875084024] [2023-11-22 18:18:58,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:18:58,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-11-22 18:18:58,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:18:58,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-11-22 18:18:58,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2800, Unknown=0, NotChecked=0, Total=2970 [2023-11-22 18:18:58,758 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand has 55 states, 55 states have (on average 4.6) internal successors, (253), 55 states have internal predecessors, (253), 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) [2023-11-22 18:19:05,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:19:05,660 INFO L93 Difference]: Finished difference Result 477 states and 505 transitions. [2023-11-22 18:19:05,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2023-11-22 18:19:05,660 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.6) internal successors, (253), 55 states have internal predecessors, (253), 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 153 [2023-11-22 18:19:05,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:19:05,662 INFO L225 Difference]: With dead ends: 477 [2023-11-22 18:19:05,662 INFO L226 Difference]: Without dead ends: 475 [2023-11-22 18:19:05,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21012 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2498, Invalid=55342, Unknown=0, NotChecked=0, Total=57840 [2023-11-22 18:19:05,666 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 431 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 6214 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 6601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 6214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-22 18:19:05,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 894 Invalid, 6601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 6214 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-22 18:19:05,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-11-22 18:19:05,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 159. [2023-11-22 18:19:05,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0316455696202531) internal successors, (163), 158 states have internal predecessors, (163), 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) [2023-11-22 18:19:05,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2023-11-22 18:19:05,742 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 153 [2023-11-22 18:19:05,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:19:05,743 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2023-11-22 18:19:05,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.6) internal successors, (253), 55 states have internal predecessors, (253), 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) [2023-11-22 18:19:05,743 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2023-11-22 18:19:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-11-22 18:19:05,744 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:19:05,744 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:19:05,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-22 18:19:05,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:19:05,951 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:19:05,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:19:05,952 INFO L85 PathProgramCache]: Analyzing trace with hash -693778066, now seen corresponding path program 28 times [2023-11-22 18:19:05,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:19:05,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235387692] [2023-11-22 18:19:05,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:19:05,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:19:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:19:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 751 proven. 203 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-22 18:19:07,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:19:07,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235387692] [2023-11-22 18:19:07,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235387692] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:19:07,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476975334] [2023-11-22 18:19:07,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-22 18:19:07,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:19:07,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:19:07,048 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:19:07,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-22 18:19:07,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-22 18:19:07,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:19:07,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-22 18:19:07,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:19:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 837 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-22 18:19:08,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:19:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 837 proven. 117 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-22 18:19:09,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476975334] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:19:09,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:19:09,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 96 [2023-11-22 18:19:09,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434443929] [2023-11-22 18:19:09,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:19:09,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-11-22 18:19:09,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:19:09,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-11-22 18:19:09,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1812, Invalid=7308, Unknown=0, NotChecked=0, Total=9120 [2023-11-22 18:19:09,602 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand has 96 states, 96 states have (on average 4.072916666666667) internal successors, (391), 96 states have internal predecessors, (391), 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) [2023-11-22 18:19:11,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-22 18:19:11,009 INFO L93 Difference]: Finished difference Result 391 states and 402 transitions. [2023-11-22 18:19:11,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-22 18:19:11,009 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 4.072916666666667) internal successors, (391), 96 states have internal predecessors, (391), 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 158 [2023-11-22 18:19:11,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-22 18:19:11,010 INFO L225 Difference]: With dead ends: 391 [2023-11-22 18:19:11,010 INFO L226 Difference]: Without dead ends: 169 [2023-11-22 18:19:11,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6277 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3386, Invalid=13126, Unknown=0, NotChecked=0, Total=16512 [2023-11-22 18:19:11,013 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 771 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-22 18:19:11,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [771 Valid, 580 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-22 18:19:11,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-22 18:19:11,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2023-11-22 18:19:11,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0304878048780488) internal successors, (169), 164 states have internal predecessors, (169), 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) [2023-11-22 18:19:11,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2023-11-22 18:19:11,073 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 158 [2023-11-22 18:19:11,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-22 18:19:11,073 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2023-11-22 18:19:11,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 4.072916666666667) internal successors, (391), 96 states have internal predecessors, (391), 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) [2023-11-22 18:19:11,073 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2023-11-22 18:19:11,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-11-22 18:19:11,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-22 18:19:11,074 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 18:19:11,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-22 18:19:11,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:19:11,275 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-22 18:19:11,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 18:19:11,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1755228911, now seen corresponding path program 29 times [2023-11-22 18:19:11,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 18:19:11,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180928687] [2023-11-22 18:19:11,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 18:19:11,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 18:19:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 18:19:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 121 proven. 1004 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-22 18:19:13,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 18:19:13,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180928687] [2023-11-22 18:19:13,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180928687] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-22 18:19:13,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832439564] [2023-11-22 18:19:13,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-22 18:19:13,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-22 18:19:13,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 18:19:13,765 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-22 18:19:13,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-22 18:19:17,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2023-11-22 18:19:17,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-22 18:19:17,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-22 18:19:17,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-22 18:19:17,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-22 18:19:17,608 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-22 18:19:17,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2023-11-22 18:19:17,646 INFO L349 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-11-22 18:19:17,646 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 26 treesize of output 25 [2023-11-22 18:19:17,692 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-22 18:19:17,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 47 treesize of output 40 [2023-11-22 18:19:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 121 proven. 859 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-22 18:19:19,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-22 18:19:22,165 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 42 treesize of output 38 [2023-11-22 18:19:22,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2023-11-22 18:19:22,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 121 proven. 859 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-22 18:19:22,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832439564] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-22 18:19:22,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-22 18:19:22,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 35, 34] total 110 [2023-11-22 18:19:22,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375635042] [2023-11-22 18:19:22,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-22 18:19:22,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2023-11-22 18:19:22,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 18:19:22,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2023-11-22 18:19:22,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=11290, Unknown=4, NotChecked=0, Total=11990 [2023-11-22 18:19:22,625 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand has 110 states, 110 states have (on average 3.790909090909091) internal successors, (417), 110 states have internal predecessors, (417), 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) Killed by 15