./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/array-tiling/mlceu.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c4f91361 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/mlceu.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 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-c4f9136-m [2023-11-23 14:43:10,613 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 14:43:10,691 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 14:43:10,695 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 14:43:10,695 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 14:43:10,719 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 14:43:10,720 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 14:43:10,720 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 14:43:10,721 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 14:43:10,724 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 14:43:10,724 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 14:43:10,725 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 14:43:10,725 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 14:43:10,726 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 14:43:10,726 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 14:43:10,726 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 14:43:10,727 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 14:43:10,727 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 14:43:10,727 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 14:43:10,727 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 14:43:10,727 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 14:43:10,728 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 14:43:10,728 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 14:43:10,728 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 14:43:10,728 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 14:43:10,729 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 14:43:10,729 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 14:43:10,729 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 14:43:10,729 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 14:43:10,730 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 14:43:10,730 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 14:43:10,731 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 14:43:10,731 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 14:43:10,731 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 14:43:10,731 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 14:43:10,731 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 14:43:10,731 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 14:43:10,732 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 14:43:10,732 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 14:43:10,732 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 14:43:10,732 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 14:43:10,733 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 14:43:10,733 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d3cc2e7af8cdfad5003daafcde8bd8bcf193cd0b5d066a7a9bad715ddc9d422 [2023-11-23 14:43:10,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 14:43:10,925 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 14:43:10,927 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 14:43:10,928 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 14:43:10,928 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 14:43:10,929 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mlceu.c [2023-11-23 14:43:11,901 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 14:43:12,091 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 14:43:12,091 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mlceu.c [2023-11-23 14:43:12,096 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64b6584ab/0762986f069e4f388651813ee8d1e407/FLAG3dade1e73 [2023-11-23 14:43:12,106 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64b6584ab/0762986f069e4f388651813ee8d1e407 [2023-11-23 14:43:12,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 14:43:12,109 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 14:43:12,110 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 14:43:12,110 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 14:43:12,114 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 14:43:12,114 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:43:12" (1/1) ... [2023-11-23 14:43:12,115 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42626b83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:12, skipping insertion in model container [2023-11-23 14:43:12,115 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:43:12" (1/1) ... [2023-11-23 14:43:12,129 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 14:43:12,226 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/mlceu.c[396,409] [2023-11-23 14:43:12,237 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 14:43:12,244 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 14:43:12,254 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/mlceu.c[396,409] [2023-11-23 14:43:12,258 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 14:43:12,268 INFO L206 MainTranslator]: Completed translation [2023-11-23 14:43:12,269 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:12 WrapperNode [2023-11-23 14:43:12,269 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 14:43:12,270 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 14:43:12,270 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 14:43:12,270 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 14:43:12,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:12" (1/1) ... [2023-11-23 14:43:12,280 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:12" (1/1) ... [2023-11-23 14:43:12,293 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 62 [2023-11-23 14:43:12,294 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 14:43:12,294 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 14:43:12,295 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 14:43:12,295 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 14:43:12,303 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:12" (1/1) ... [2023-11-23 14:43:12,303 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:12" (1/1) ... [2023-11-23 14:43:12,304 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:12" (1/1) ... [2023-11-23 14:43:12,315 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 8, 3]. 62 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 2 writes are split as follows [0, 0, 2]. [2023-11-23 14:43:12,315 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:12" (1/1) ... [2023-11-23 14:43:12,315 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:12" (1/1) ... [2023-11-23 14:43:12,318 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:12" (1/1) ... [2023-11-23 14:43:12,321 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:12" (1/1) ... [2023-11-23 14:43:12,321 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:12" (1/1) ... [2023-11-23 14:43:12,322 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:12" (1/1) ... [2023-11-23 14:43:12,323 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 14:43:12,324 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 14:43:12,324 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 14:43:12,324 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 14:43:12,325 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:12" (1/1) ... [2023-11-23 14:43:12,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 14:43:12,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:12,349 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) [2023-11-23 14:43:12,357 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 [2023-11-23 14:43:12,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 14:43:12,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 14:43:12,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 14:43:12,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 14:43:12,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 14:43:12,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 14:43:12,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 14:43:12,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 14:43:12,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 14:43:12,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 14:43:12,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 14:43:12,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 14:43:12,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 14:43:12,452 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 14:43:12,466 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 14:43:12,565 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 14:43:12,585 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 14:43:12,585 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 14:43:12,586 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:43:12 BoogieIcfgContainer [2023-11-23 14:43:12,586 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 14:43:12,587 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 14:43:12,588 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 14:43:12,590 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 14:43:12,590 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:43:12" (1/3) ... [2023-11-23 14:43:12,591 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1620f72b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:43:12, skipping insertion in model container [2023-11-23 14:43:12,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:12" (2/3) ... [2023-11-23 14:43:12,591 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1620f72b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:43:12, skipping insertion in model container [2023-11-23 14:43:12,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:43:12" (3/3) ... [2023-11-23 14:43:12,592 INFO L112 eAbstractionObserver]: Analyzing ICFG mlceu.c [2023-11-23 14:43:12,606 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 14:43:12,627 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 14:43:12,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 14:43:12,670 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;@103188bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 14:43:12,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 14:43:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:12,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 14:43:12,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:12,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:12,680 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:12,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:12,684 INFO L85 PathProgramCache]: Analyzing trace with hash -569365392, now seen corresponding path program 1 times [2023-11-23 14:43:12,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:12,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774926008] [2023-11-23 14:43:12,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:12,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:12,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:12,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:12,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774926008] [2023-11-23 14:43:12,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774926008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:43:12,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:43:12,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 14:43:12,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198633200] [2023-11-23 14:43:12,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:43:12,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 14:43:12,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:12,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 14:43:12,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 14:43:12,857 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 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 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:12,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:12,873 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2023-11-23 14:43:12,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 14:43:12,875 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-11-23 14:43:12,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:12,881 INFO L225 Difference]: With dead ends: 29 [2023-11-23 14:43:12,881 INFO L226 Difference]: Without dead ends: 13 [2023-11-23 14:43:12,883 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 [2023-11-23 14:43:12,885 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:12,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:43:12,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-23 14:43:12,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-23 14:43:12,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:12,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-11-23 14:43:12,907 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2023-11-23 14:43:12,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:12,907 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-11-23 14:43:12,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:12,908 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-11-23 14:43:12,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 14:43:12,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:12,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:12,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 14:43:12,909 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:12,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:12,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1205641970, now seen corresponding path program 1 times [2023-11-23 14:43:12,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:12,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458570673] [2023-11-23 14:43:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:12,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:12,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:12,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458570673] [2023-11-23 14:43:12,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458570673] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:43:12,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:43:12,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 14:43:12,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131223967] [2023-11-23 14:43:12,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:43:12,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 14:43:12,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:12,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 14:43:12,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 14:43:12,995 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:13,021 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-11-23 14:43:13,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 14:43:13,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-11-23 14:43:13,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:13,022 INFO L225 Difference]: With dead ends: 30 [2023-11-23 14:43:13,022 INFO L226 Difference]: Without dead ends: 21 [2023-11-23 14:43:13,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 14:43:13,024 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:13,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 11 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:43:13,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-23 14:43:13,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2023-11-23 14:43:13,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:13,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-11-23 14:43:13,028 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2023-11-23 14:43:13,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:13,028 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-11-23 14:43:13,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:13,028 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-11-23 14:43:13,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 14:43:13,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:13,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:13,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 14:43:13,029 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:13,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:13,030 INFO L85 PathProgramCache]: Analyzing trace with hash 557936914, now seen corresponding path program 1 times [2023-11-23 14:43:13,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:13,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50816213] [2023-11-23 14:43:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:13,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:13,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:13,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:13,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50816213] [2023-11-23 14:43:13,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50816213] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:13,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803197040] [2023-11-23 14:43:13,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:13,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:13,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:13,417 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) [2023-11-23 14:43:13,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 14:43:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:13,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 14:43:13,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:13,570 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 [2023-11-23 14:43:13,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:13,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:13,707 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 14 treesize of output 12 [2023-11-23 14:43:13,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-23 14:43:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:13,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803197040] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:13,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:13,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-23 14:43:13,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586200896] [2023-11-23 14:43:13,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:13,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 14:43:13,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:13,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 14:43:13,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-23 14:43:13,733 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:13,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:13,802 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2023-11-23 14:43:13,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 14:43:13,803 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 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 12 [2023-11-23 14:43:13,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:13,804 INFO L225 Difference]: With dead ends: 22 [2023-11-23 14:43:13,804 INFO L226 Difference]: Without dead ends: 20 [2023-11-23 14:43:13,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-23 14:43:13,808 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:13,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:43:13,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-23 14:43:13,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2023-11-23 14:43:13,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:13,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-11-23 14:43:13,817 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2023-11-23 14:43:13,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:13,817 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-11-23 14:43:13,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:13,817 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-11-23 14:43:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 14:43:13,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:13,818 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:13,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 14:43:14,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:14,032 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:14,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:14,036 INFO L85 PathProgramCache]: Analyzing trace with hash -19725265, now seen corresponding path program 1 times [2023-11-23 14:43:14,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:14,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488535734] [2023-11-23 14:43:14,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:14,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:14,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:14,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488535734] [2023-11-23 14:43:14,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488535734] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:14,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855129672] [2023-11-23 14:43:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:14,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:14,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:14,132 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) [2023-11-23 14:43:14,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 14:43:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:14,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 14:43:14,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:14,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:14,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855129672] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:14,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:14,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-23 14:43:14,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342556425] [2023-11-23 14:43:14,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:14,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 14:43:14,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:14,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 14:43:14,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-23 14:43:14,258 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2023-11-23 14:43:14,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:14,301 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-11-23 14:43:14,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 14:43:14,301 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) Word has length 15 [2023-11-23 14:43:14,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:14,302 INFO L225 Difference]: With dead ends: 43 [2023-11-23 14:43:14,302 INFO L226 Difference]: Without dead ends: 27 [2023-11-23 14:43:14,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-23 14:43:14,303 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:14,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 30 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:43:14,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-23 14:43:14,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2023-11-23 14:43:14,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:14,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-11-23 14:43:14,306 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2023-11-23 14:43:14,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:14,306 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-11-23 14:43:14,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2023-11-23 14:43:14,307 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-11-23 14:43:14,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 14:43:14,307 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:14,307 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:14,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 14:43:14,518 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,SelfDestructingSolverStorable3 [2023-11-23 14:43:14,519 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:14,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:14,519 INFO L85 PathProgramCache]: Analyzing trace with hash 497859151, now seen corresponding path program 2 times [2023-11-23 14:43:14,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:14,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208619476] [2023-11-23 14:43:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:14,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:14,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:14,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208619476] [2023-11-23 14:43:14,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208619476] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:14,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911380931] [2023-11-23 14:43:14,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:43:14,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:14,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:14,679 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) [2023-11-23 14:43:14,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 14:43:14,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:43:14,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:14,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 14:43:14,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:14,747 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 [2023-11-23 14:43:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:14,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:14,841 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 16 treesize of output 14 [2023-11-23 14:43:14,843 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 [2023-11-23 14:43:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:14,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911380931] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:14,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:14,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-11-23 14:43:14,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500559268] [2023-11-23 14:43:14,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:14,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 14:43:14,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:14,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 14:43:14,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-23 14:43:14,862 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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) [2023-11-23 14:43:14,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:14,975 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2023-11-23 14:43:14,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 14:43:14,975 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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) Word has length 18 [2023-11-23 14:43:14,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:14,976 INFO L225 Difference]: With dead ends: 28 [2023-11-23 14:43:14,976 INFO L226 Difference]: Without dead ends: 26 [2023-11-23 14:43:14,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-23 14:43:14,977 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:14,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 56 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:43:14,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-23 14:43:14,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2023-11-23 14:43:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 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) [2023-11-23 14:43:14,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-11-23 14:43:14,981 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2023-11-23 14:43:14,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:14,981 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-11-23 14:43:14,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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) [2023-11-23 14:43:14,981 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-11-23 14:43:14,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 14:43:14,982 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:14,982 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:14,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 14:43:15,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:15,190 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:15,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:15,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1204999634, now seen corresponding path program 3 times [2023-11-23 14:43:15,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:15,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801283294] [2023-11-23 14:43:15,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:15,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:15,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:15,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801283294] [2023-11-23 14:43:15,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801283294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:15,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308550475] [2023-11-23 14:43:15,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 14:43:15,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:15,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:15,250 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) [2023-11-23 14:43:15,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 14:43:15,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 14:43:15,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:15,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 14:43:15,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:15,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:15,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308550475] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:15,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:15,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-23 14:43:15,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147909570] [2023-11-23 14:43:15,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:15,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 14:43:15,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:15,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 14:43:15,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-23 14:43:15,391 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:15,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:15,450 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-11-23 14:43:15,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 14:43:15,450 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-23 14:43:15,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:15,451 INFO L225 Difference]: With dead ends: 55 [2023-11-23 14:43:15,451 INFO L226 Difference]: Without dead ends: 33 [2023-11-23 14:43:15,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-11-23 14:43:15,452 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:15,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 40 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:43:15,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-23 14:43:15,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2023-11-23 14:43:15,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 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) [2023-11-23 14:43:15,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-11-23 14:43:15,455 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2023-11-23 14:43:15,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:15,456 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-11-23 14:43:15,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:15,456 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-11-23 14:43:15,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 14:43:15,456 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:15,456 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:15,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-23 14:43:15,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:15,662 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:15,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:15,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1792242674, now seen corresponding path program 4 times [2023-11-23 14:43:15,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:15,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112050973] [2023-11-23 14:43:15,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:15,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:15,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:15,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112050973] [2023-11-23 14:43:15,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112050973] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:15,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797813793] [2023-11-23 14:43:15,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 14:43:15,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:15,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:15,843 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) [2023-11-23 14:43:15,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 14:43:15,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 14:43:15,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:15,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-23 14:43:15,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:15,926 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 [2023-11-23 14:43:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:15,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:16,040 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 16 treesize of output 14 [2023-11-23 14:43:16,042 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 [2023-11-23 14:43:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:16,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797813793] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:16,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:16,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2023-11-23 14:43:16,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237829875] [2023-11-23 14:43:16,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:16,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 14:43:16,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:16,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 14:43:16,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-23 14:43:16,076 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:16,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:16,248 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2023-11-23 14:43:16,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 14:43:16,248 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-23 14:43:16,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:16,248 INFO L225 Difference]: With dead ends: 34 [2023-11-23 14:43:16,249 INFO L226 Difference]: Without dead ends: 32 [2023-11-23 14:43:16,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2023-11-23 14:43:16,249 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:16,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 59 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:43:16,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-23 14:43:16,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2023-11-23 14:43:16,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:16,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-11-23 14:43:16,253 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2023-11-23 14:43:16,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:16,253 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-11-23 14:43:16,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-11-23 14:43:16,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 14:43:16,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:16,254 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:16,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 14:43:16,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:16,466 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:16,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:16,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1968149839, now seen corresponding path program 5 times [2023-11-23 14:43:16,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:16,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054774585] [2023-11-23 14:43:16,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:16,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:16,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:16,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054774585] [2023-11-23 14:43:16,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054774585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:16,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037648131] [2023-11-23 14:43:16,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 14:43:16,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:16,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:16,564 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) [2023-11-23 14:43:16,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 14:43:16,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-23 14:43:16,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:16,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 14:43:16,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:16,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:16,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037648131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:16,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:16,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-23 14:43:16,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696525296] [2023-11-23 14:43:16,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:16,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 14:43:16,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:16,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 14:43:16,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-23 14:43:16,762 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 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) [2023-11-23 14:43:16,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:16,826 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2023-11-23 14:43:16,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 14:43:16,826 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 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) Word has length 27 [2023-11-23 14:43:16,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:16,827 INFO L225 Difference]: With dead ends: 67 [2023-11-23 14:43:16,827 INFO L226 Difference]: Without dead ends: 39 [2023-11-23 14:43:16,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-11-23 14:43:16,828 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:16,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 40 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:43:16,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-23 14:43:16,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2023-11-23 14:43:16,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:16,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-11-23 14:43:16,831 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2023-11-23 14:43:16,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:16,832 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-11-23 14:43:16,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 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) [2023-11-23 14:43:16,832 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-11-23 14:43:16,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 14:43:16,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:16,833 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:16,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 14:43:17,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:17,048 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:17,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:17,049 INFO L85 PathProgramCache]: Analyzing trace with hash 229186415, now seen corresponding path program 6 times [2023-11-23 14:43:17,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:17,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140454622] [2023-11-23 14:43:17,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:17,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:17,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:17,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140454622] [2023-11-23 14:43:17,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140454622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:17,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803182816] [2023-11-23 14:43:17,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 14:43:17,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:17,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:17,288 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) [2023-11-23 14:43:17,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 14:43:17,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-23 14:43:17,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:17,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-23 14:43:17,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:17,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-23 14:43:17,899 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-23 14:43:17,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2023-11-23 14:43:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:17,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:18,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-23 14:43:18,175 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 18 treesize of output 12 [2023-11-23 14:43:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:18,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803182816] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:18,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:18,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 14] total 37 [2023-11-23 14:43:18,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105448254] [2023-11-23 14:43:18,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:18,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-23 14:43:18,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:18,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-23 14:43:18,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 14:43:18,299 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 37 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) [2023-11-23 14:43:19,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:19,817 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2023-11-23 14:43:19,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-23 14:43:19,817 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 37 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-23 14:43:19,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:19,818 INFO L225 Difference]: With dead ends: 97 [2023-11-23 14:43:19,818 INFO L226 Difference]: Without dead ends: 47 [2023-11-23 14:43:19,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1143, Invalid=5663, Unknown=0, NotChecked=0, Total=6806 [2023-11-23 14:43:19,820 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 195 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:19,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 72 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 14:43:19,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-23 14:43:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2023-11-23 14:43:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:19,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-11-23 14:43:19,824 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 30 [2023-11-23 14:43:19,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:19,824 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-11-23 14:43:19,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 37 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) [2023-11-23 14:43:19,824 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-11-23 14:43:19,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 14:43:19,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:19,825 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:19,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-23 14:43:20,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:20,026 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:20,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:20,026 INFO L85 PathProgramCache]: Analyzing trace with hash 515402032, now seen corresponding path program 1 times [2023-11-23 14:43:20,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:20,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169586729] [2023-11-23 14:43:20,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:20,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 14:43:20,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:20,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169586729] [2023-11-23 14:43:20,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169586729] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:20,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534329734] [2023-11-23 14:43:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:20,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:20,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:20,147 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) [2023-11-23 14:43:20,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 14:43:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:20,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 14:43:20,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 14:43:20,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:20,321 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 14:43:20,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534329734] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:20,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:20,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-11-23 14:43:20,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977388358] [2023-11-23 14:43:20,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:20,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-23 14:43:20,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:20,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-23 14:43:20,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2023-11-23 14:43:20,323 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 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) [2023-11-23 14:43:20,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:20,417 INFO L93 Difference]: Finished difference Result 127 states and 144 transitions. [2023-11-23 14:43:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 14:43:20,418 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 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 39 [2023-11-23 14:43:20,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:20,419 INFO L225 Difference]: With dead ends: 127 [2023-11-23 14:43:20,419 INFO L226 Difference]: Without dead ends: 107 [2023-11-23 14:43:20,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2023-11-23 14:43:20,420 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 111 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:20,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 44 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:43:20,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-23 14:43:20,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 59. [2023-11-23 14:43:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 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) [2023-11-23 14:43:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2023-11-23 14:43:20,427 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 39 [2023-11-23 14:43:20,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:20,427 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2023-11-23 14:43:20,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 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) [2023-11-23 14:43:20,427 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2023-11-23 14:43:20,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 14:43:20,428 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:20,428 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:20,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-23 14:43:20,639 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,SelfDestructingSolverStorable9 [2023-11-23 14:43:20,639 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:20,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:20,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1173541710, now seen corresponding path program 7 times [2023-11-23 14:43:20,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:20,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883354503] [2023-11-23 14:43:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:20,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:20,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:20,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883354503] [2023-11-23 14:43:20,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883354503] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:20,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812298626] [2023-11-23 14:43:20,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 14:43:20,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:20,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:20,945 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) [2023-11-23 14:43:20,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 14:43:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:21,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-23 14:43:21,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:21,098 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 [2023-11-23 14:43:21,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:43:21,145 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 21 treesize of output 20 [2023-11-23 14:43:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:21,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:21,533 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 16 treesize of output 14 [2023-11-23 14:43:21,534 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 [2023-11-23 14:43:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 1 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 14:43:21,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812298626] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:21,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:21,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 31 [2023-11-23 14:43:21,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199995869] [2023-11-23 14:43:21,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:21,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-23 14:43:21,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:21,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-23 14:43:21,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2023-11-23 14:43:21,549 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:23,968 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] [2023-11-23 14:43:25,970 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] [2023-11-23 14:43:27,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:27,936 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2023-11-23 14:43:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-23 14:43:27,937 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-23 14:43:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:27,937 INFO L225 Difference]: With dead ends: 89 [2023-11-23 14:43:27,937 INFO L226 Difference]: Without dead ends: 87 [2023-11-23 14:43:27,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=312, Invalid=2444, Unknown=0, NotChecked=0, Total=2756 [2023-11-23 14:43:27,938 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 76 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 43 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:27,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 152 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 642 Invalid, 8 Unknown, 0 Unchecked, 6.1s Time] [2023-11-23 14:43:27,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-23 14:43:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2023-11-23 14:43:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:27,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2023-11-23 14:43:27,944 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 39 [2023-11-23 14:43:27,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:27,945 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2023-11-23 14:43:27,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:27,945 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2023-11-23 14:43:27,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 14:43:27,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:27,945 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:27,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-23 14:43:28,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:28,146 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:28,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:28,147 INFO L85 PathProgramCache]: Analyzing trace with hash 57812111, now seen corresponding path program 8 times [2023-11-23 14:43:28,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:28,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80788234] [2023-11-23 14:43:28,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:28,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:28,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:28,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80788234] [2023-11-23 14:43:28,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80788234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:28,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760992965] [2023-11-23 14:43:28,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:43:28,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:28,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:28,426 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) [2023-11-23 14:43:28,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 14:43:28,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:43:28,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:28,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-23 14:43:28,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:28,607 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 [2023-11-23 14:43:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:28,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:28,889 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 16 treesize of output 14 [2023-11-23 14:43:28,890 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 [2023-11-23 14:43:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:28,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760992965] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:28,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:28,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2023-11-23 14:43:28,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99175677] [2023-11-23 14:43:28,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:28,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-23 14:43:28,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:28,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-23 14:43:28,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2023-11-23 14:43:28,906 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:29,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:29,256 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2023-11-23 14:43:29,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-23 14:43:29,257 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-11-23 14:43:29,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:29,257 INFO L225 Difference]: With dead ends: 69 [2023-11-23 14:43:29,257 INFO L226 Difference]: Without dead ends: 67 [2023-11-23 14:43:29,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=1773, Unknown=0, NotChecked=0, Total=1980 [2023-11-23 14:43:29,258 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:29,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 162 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:43:29,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-23 14:43:29,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2023-11-23 14:43:29,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2023-11-23 14:43:29,265 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 42 [2023-11-23 14:43:29,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:29,265 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2023-11-23 14:43:29,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:29,265 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2023-11-23 14:43:29,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 14:43:29,266 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:29,266 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:29,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 14:43:29,471 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,SelfDestructingSolverStorable11 [2023-11-23 14:43:29,471 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:29,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:29,471 INFO L85 PathProgramCache]: Analyzing trace with hash 3818386, now seen corresponding path program 9 times [2023-11-23 14:43:29,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:29,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2746887] [2023-11-23 14:43:29,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:29,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 41 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:29,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:29,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2746887] [2023-11-23 14:43:29,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2746887] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:29,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198368119] [2023-11-23 14:43:29,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 14:43:29,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:29,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:29,630 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) [2023-11-23 14:43:29,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 14:43:29,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-23 14:43:29,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:29,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 14:43:29,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 57 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:29,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 57 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:29,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198368119] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:29,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:29,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-11-23 14:43:29,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718031424] [2023-11-23 14:43:29,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:29,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-23 14:43:29,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:29,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-23 14:43:29,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-11-23 14:43:29,978 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:30,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:30,094 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2023-11-23 14:43:30,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 14:43:30,094 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-11-23 14:43:30,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:30,095 INFO L225 Difference]: With dead ends: 96 [2023-11-23 14:43:30,095 INFO L226 Difference]: Without dead ends: 71 [2023-11-23 14:43:30,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 68 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-11-23 14:43:30,096 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:30,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 66 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:43:30,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-23 14:43:30,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2023-11-23 14:43:30,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.125) internal successors, (72), 64 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) [2023-11-23 14:43:30,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2023-11-23 14:43:30,103 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 45 [2023-11-23 14:43:30,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:30,103 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2023-11-23 14:43:30,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:30,103 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2023-11-23 14:43:30,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-23 14:43:30,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:30,103 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:30,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-23 14:43:30,311 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,SelfDestructingSolverStorable12 [2023-11-23 14:43:30,312 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:30,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:30,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2026537394, now seen corresponding path program 10 times [2023-11-23 14:43:30,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:30,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318116992] [2023-11-23 14:43:30,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:30,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:30,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:30,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318116992] [2023-11-23 14:43:30,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318116992] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:30,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297102602] [2023-11-23 14:43:30,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 14:43:30,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:30,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:30,608 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) [2023-11-23 14:43:30,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 14:43:30,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 14:43:30,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:30,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-23 14:43:30,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:30,690 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 [2023-11-23 14:43:30,839 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:30,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:30,888 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 16 treesize of output 14 [2023-11-23 14:43:30,890 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 [2023-11-23 14:43:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:30,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297102602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:30,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:30,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 28 [2023-11-23 14:43:30,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184543110] [2023-11-23 14:43:30,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:30,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-23 14:43:30,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:30,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-23 14:43:30,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2023-11-23 14:43:30,909 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 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) [2023-11-23 14:43:31,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:31,322 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2023-11-23 14:43:31,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-23 14:43:31,323 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 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) Word has length 48 [2023-11-23 14:43:31,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:31,323 INFO L225 Difference]: With dead ends: 72 [2023-11-23 14:43:31,323 INFO L226 Difference]: Without dead ends: 70 [2023-11-23 14:43:31,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=1709, Unknown=0, NotChecked=0, Total=1892 [2023-11-23 14:43:31,324 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:31,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 157 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:43:31,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-23 14:43:31,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2023-11-23 14:43:31,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 67 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:31,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2023-11-23 14:43:31,333 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 48 [2023-11-23 14:43:31,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:31,333 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2023-11-23 14:43:31,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 28 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) [2023-11-23 14:43:31,333 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2023-11-23 14:43:31,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-23 14:43:31,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:31,334 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:31,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 14:43:31,545 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,SelfDestructingSolverStorable13 [2023-11-23 14:43:31,546 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:31,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:31,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1774669937, now seen corresponding path program 11 times [2023-11-23 14:43:31,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:31,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766188322] [2023-11-23 14:43:31,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:31,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 58 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:31,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:31,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766188322] [2023-11-23 14:43:31,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766188322] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:31,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4537128] [2023-11-23 14:43:31,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 14:43:31,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:31,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:31,743 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) [2023-11-23 14:43:31,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 14:43:31,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-23 14:43:31,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:31,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 14:43:31,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 77 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:31,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 77 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:32,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4537128] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:32,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:32,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-11-23 14:43:32,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143146959] [2023-11-23 14:43:32,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:32,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-23 14:43:32,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:32,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-23 14:43:32,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-11-23 14:43:32,049 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:32,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:32,178 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2023-11-23 14:43:32,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 14:43:32,178 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 0 states have call successors, (0), 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 51 [2023-11-23 14:43:32,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:32,179 INFO L225 Difference]: With dead ends: 102 [2023-11-23 14:43:32,179 INFO L226 Difference]: Without dead ends: 74 [2023-11-23 14:43:32,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 77 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 14:43:32,180 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 57 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:32,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 81 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:43:32,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-23 14:43:32,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2023-11-23 14:43:32,186 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) [2023-11-23 14:43:32,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2023-11-23 14:43:32,186 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 51 [2023-11-23 14:43:32,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:32,187 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2023-11-23 14:43:32,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 29 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:32,187 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2023-11-23 14:43:32,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 14:43:32,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:32,188 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:32,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 14:43:32,399 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,SelfDestructingSolverStorable14 [2023-11-23 14:43:32,399 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:32,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:32,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1041640017, now seen corresponding path program 12 times [2023-11-23 14:43:32,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:32,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514964270] [2023-11-23 14:43:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:32,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:32,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:32,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514964270] [2023-11-23 14:43:32,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514964270] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:32,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238691749] [2023-11-23 14:43:32,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 14:43:32,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:32,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:32,760 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) [2023-11-23 14:43:32,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 14:43:32,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-23 14:43:32,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:32,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-23 14:43:32,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:33,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-23 14:43:33,721 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-23 14:43:33,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2023-11-23 14:43:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 70 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:33,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:34,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-23 14:43:34,244 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 18 treesize of output 12 [2023-11-23 14:43:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 63 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:34,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238691749] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:34,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:34,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 22] total 62 [2023-11-23 14:43:34,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101435332] [2023-11-23 14:43:34,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:34,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-23 14:43:34,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:34,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-23 14:43:34,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=3317, Unknown=0, NotChecked=0, Total=3782 [2023-11-23 14:43:34,569 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 62 states, 62 states have (on average 2.5) internal successors, (155), 62 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:37,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:37,919 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2023-11-23 14:43:37,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-23 14:43:37,919 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.5) internal successors, (155), 62 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-23 14:43:37,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:37,919 INFO L225 Difference]: With dead ends: 137 [2023-11-23 14:43:37,919 INFO L226 Difference]: Without dead ends: 78 [2023-11-23 14:43:37,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4952 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2499, Invalid=16961, Unknown=0, NotChecked=0, Total=19460 [2023-11-23 14:43:37,923 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 472 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:37,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 226 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 14:43:37,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-23 14:43:37,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2023-11-23 14:43:37,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:37,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2023-11-23 14:43:37,932 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 54 [2023-11-23 14:43:37,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:37,932 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2023-11-23 14:43:37,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.5) internal successors, (155), 62 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:37,932 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2023-11-23 14:43:37,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-23 14:43:37,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:37,934 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:37,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-23 14:43:38,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:38,139 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:38,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:38,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1926449778, now seen corresponding path program 13 times [2023-11-23 14:43:38,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:38,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623737495] [2023-11-23 14:43:38,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:38,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 1 proven. 244 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:38,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:38,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623737495] [2023-11-23 14:43:38,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623737495] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:38,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197674150] [2023-11-23 14:43:38,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 14:43:38,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:38,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:38,598 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) [2023-11-23 14:43:38,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 14:43:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:38,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-23 14:43:38,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:38,916 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 11 treesize of output 7 [2023-11-23 14:43:38,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:43:38,974 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 21 treesize of output 20 [2023-11-23 14:43:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:39,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:39,860 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_294| Int)) (or (= (select (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_294| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0) (+ 32 |c_ULTIMATE.start_main_~a~0#1.offset|)) 0) (< |v_ULTIMATE.start_main_~i~0#1_294| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2023-11-23 14:43:39,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-11-23 14:43:39,866 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 25 treesize of output 21 [2023-11-23 14:43:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 1 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2023-11-23 14:43:39,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197674150] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:39,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:39,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-11-23 14:43:39,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504953658] [2023-11-23 14:43:39,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:39,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-23 14:43:39,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:39,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-23 14:43:39,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1984, Unknown=1, NotChecked=90, Total=2256 [2023-11-23 14:43:39,891 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 48 states, 48 states have (on average 2.6875) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:42,917 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] [2023-11-23 14:43:44,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:43:47,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:43:47,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:47,409 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2023-11-23 14:43:47,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-23 14:43:47,409 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.6875) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 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 63 [2023-11-23 14:43:47,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:47,410 INFO L225 Difference]: With dead ends: 113 [2023-11-23 14:43:47,410 INFO L226 Difference]: Without dead ends: 111 [2023-11-23 14:43:47,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=510, Invalid=6633, Unknown=1, NotChecked=166, Total=7310 [2023-11-23 14:43:47,412 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 102 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 62 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1710 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:47,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 380 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1710 Invalid, 4 Unknown, 104 Unchecked, 6.9s Time] [2023-11-23 14:43:47,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-23 14:43:47,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 74. [2023-11-23 14:43:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 73 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2023-11-23 14:43:47,423 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 63 [2023-11-23 14:43:47,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:47,423 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2023-11-23 14:43:47,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.6875) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:47,424 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2023-11-23 14:43:47,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-23 14:43:47,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:47,424 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:47,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-23 14:43:47,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 14:43:47,633 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:47,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:47,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1517432527, now seen corresponding path program 14 times [2023-11-23 14:43:47,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:47,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009018051] [2023-11-23 14:43:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:47,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:48,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:48,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009018051] [2023-11-23 14:43:48,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009018051] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:48,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548396551] [2023-11-23 14:43:48,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:43:48,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:48,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:48,071 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) [2023-11-23 14:43:48,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 14:43:48,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:43:48,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:48,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-23 14:43:48,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:48,410 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 [2023-11-23 14:43:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:48,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:48,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 14:43:48,896 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 16 treesize of output 12 [2023-11-23 14:43:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:48,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548396551] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:48,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:48,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2023-11-23 14:43:48,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254600457] [2023-11-23 14:43:48,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:48,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-23 14:43:48,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:48,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-23 14:43:48,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2093, Unknown=0, NotChecked=0, Total=2256 [2023-11-23 14:43:48,931 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 48 states, 48 states have (on average 2.8125) internal successors, (135), 48 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:49,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:49,669 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2023-11-23 14:43:49,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-23 14:43:49,670 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8125) internal successors, (135), 48 states have internal predecessors, (135), 0 states have call successors, (0), 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 66 [2023-11-23 14:43:49,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:49,670 INFO L225 Difference]: With dead ends: 81 [2023-11-23 14:43:49,670 INFO L226 Difference]: Without dead ends: 79 [2023-11-23 14:43:49,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=323, Invalid=4369, Unknown=0, NotChecked=0, Total=4692 [2023-11-23 14:43:49,672 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:49,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 331 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 14:43:49,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-23 14:43:49,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2023-11-23 14:43:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 76 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:49,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2023-11-23 14:43:49,680 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 66 [2023-11-23 14:43:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:49,680 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2023-11-23 14:43:49,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8125) internal successors, (135), 48 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:49,681 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2023-11-23 14:43:49,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 14:43:49,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:49,681 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:49,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 14:43:49,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 14:43:49,882 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:49,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:49,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1306726738, now seen corresponding path program 15 times [2023-11-23 14:43:49,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:49,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417135750] [2023-11-23 14:43:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:49,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 127 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:50,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:50,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417135750] [2023-11-23 14:43:50,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417135750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:50,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099909909] [2023-11-23 14:43:50,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 14:43:50,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:50,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:50,192 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) [2023-11-23 14:43:50,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 14:43:50,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-23 14:43:50,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:50,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-23 14:43:50,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 155 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:50,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 155 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:50,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099909909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:50,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:50,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-11-23 14:43:50,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922747319] [2023-11-23 14:43:50,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:50,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-23 14:43:50,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:50,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-23 14:43:50,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2023-11-23 14:43:50,829 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 38 states, 38 states have (on average 2.8684210526315788) internal successors, (109), 38 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) [2023-11-23 14:43:51,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:51,011 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2023-11-23 14:43:51,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-23 14:43:51,011 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.8684210526315788) internal successors, (109), 38 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) Word has length 69 [2023-11-23 14:43:51,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:51,012 INFO L225 Difference]: With dead ends: 120 [2023-11-23 14:43:51,012 INFO L226 Difference]: Without dead ends: 83 [2023-11-23 14:43:51,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 104 SyntacticMatches, 21 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2023-11-23 14:43:51,013 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 95 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:51,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 101 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:43:51,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-23 14:43:51,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2023-11-23 14:43:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 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) [2023-11-23 14:43:51,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2023-11-23 14:43:51,034 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 69 [2023-11-23 14:43:51,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:51,034 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2023-11-23 14:43:51,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.8684210526315788) internal successors, (109), 38 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) [2023-11-23 14:43:51,034 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2023-11-23 14:43:51,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-23 14:43:51,035 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:51,035 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:51,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 14:43:51,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:51,241 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:51,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:51,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1327689586, now seen corresponding path program 16 times [2023-11-23 14:43:51,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:51,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683061876] [2023-11-23 14:43:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:51,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:51,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:51,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683061876] [2023-11-23 14:43:51,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683061876] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:51,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607297528] [2023-11-23 14:43:51,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 14:43:51,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:51,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:51,757 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) [2023-11-23 14:43:51,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-23 14:43:51,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 14:43:51,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:51,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-23 14:43:51,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:51,847 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 [2023-11-23 14:43:51,890 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 [2023-11-23 14:43:51,966 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:43:51,967 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 [2023-11-23 14:43:52,045 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:43:52,046 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 [2023-11-23 14:43:52,136 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:43:52,136 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 [2023-11-23 14:43:52,246 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:43:52,246 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 [2023-11-23 14:43:52,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:43:52,328 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 [2023-11-23 14:43:52,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:43:52,455 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 77 treesize of output 94 [2023-11-23 14:43:52,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:43:52,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 86 treesize of output 106 [2023-11-23 14:43:52,732 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:43:52,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 95 treesize of output 118 [2023-11-23 14:43:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:54,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:55,602 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 178 treesize of output 174 [2023-11-23 14:43:55,609 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:43:55,609 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 227 treesize of output 219 [2023-11-23 14:43:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:55,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607297528] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:55,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:55,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 36, 37] total 83 [2023-11-23 14:43:55,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111102380] [2023-11-23 14:43:55,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:55,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-11-23 14:43:55,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:55,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-11-23 14:43:55,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=5814, Unknown=0, NotChecked=0, Total=6806 [2023-11-23 14:43:55,798 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 83 states, 83 states have (on average 2.1204819277108435) internal successors, (176), 83 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:57,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:57,223 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2023-11-23 14:43:57,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-23 14:43:57,223 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.1204819277108435) internal successors, (176), 83 states have internal predecessors, (176), 0 states have call successors, (0), 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 72 [2023-11-23 14:43:57,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:57,224 INFO L225 Difference]: With dead ends: 84 [2023-11-23 14:43:57,224 INFO L226 Difference]: Without dead ends: 82 [2023-11-23 14:43:57,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2641 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1495, Invalid=8011, Unknown=0, NotChecked=0, Total=9506 [2023-11-23 14:43:57,225 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 47 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 2303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:57,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 153 Invalid, 2303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2277 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 14:43:57,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-23 14:43:57,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2023-11-23 14:43:57,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 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) [2023-11-23 14:43:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2023-11-23 14:43:57,236 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 72 [2023-11-23 14:43:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:57,236 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2023-11-23 14:43:57,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.1204819277108435) internal successors, (176), 83 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:57,236 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2023-11-23 14:43:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-23 14:43:57,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:57,237 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:57,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-23 14:43:57,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:57,449 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:57,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:57,449 INFO L85 PathProgramCache]: Analyzing trace with hash 851732943, now seen corresponding path program 17 times [2023-11-23 14:43:57,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:57,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954731009] [2023-11-23 14:43:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:57,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:57,756 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 156 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:57,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:57,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954731009] [2023-11-23 14:43:57,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954731009] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:57,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870664981] [2023-11-23 14:43:57,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 14:43:57,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:57,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:57,757 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) [2023-11-23 14:43:57,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-23 14:43:57,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-23 14:43:57,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:57,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-23 14:43:57,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 187 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:58,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 187 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:58,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870664981] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:58,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:58,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-11-23 14:43:58,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041696837] [2023-11-23 14:43:58,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:58,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-23 14:43:58,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:58,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-23 14:43:58,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 14:43:58,278 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 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) [2023-11-23 14:43:58,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:58,434 INFO L93 Difference]: Finished difference Result 127 states and 130 transitions. [2023-11-23 14:43:58,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-23 14:43:58,435 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 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 75 [2023-11-23 14:43:58,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:58,435 INFO L225 Difference]: With dead ends: 127 [2023-11-23 14:43:58,435 INFO L226 Difference]: Without dead ends: 87 [2023-11-23 14:43:58,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 113 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2023-11-23 14:43:58,436 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 105 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:58,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 130 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:43:58,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-23 14:43:58,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2023-11-23 14:43:58,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2023-11-23 14:43:58,447 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 75 [2023-11-23 14:43:58,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:58,447 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2023-11-23 14:43:58,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 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) [2023-11-23 14:43:58,448 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2023-11-23 14:43:58,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-23 14:43:58,448 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:58,448 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:58,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-23 14:43:58,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:58,660 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:58,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:58,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1290612719, now seen corresponding path program 18 times [2023-11-23 14:43:58,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:58,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838460002] [2023-11-23 14:43:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:58,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:59,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:59,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838460002] [2023-11-23 14:43:59,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838460002] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:59,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50470338] [2023-11-23 14:43:59,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 14:43:59,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:59,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:59,132 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) [2023-11-23 14:43:59,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-23 14:43:59,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-11-23 14:43:59,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:59,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-23 14:43:59,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:59,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-23 14:44:00,928 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-23 14:44:00,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2023-11-23 14:44:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 176 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:00,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:44:01,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-23 14:44:01,822 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 18 treesize of output 12 [2023-11-23 14:44:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 165 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:02,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50470338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:44:02,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:44:02,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32, 30] total 86 [2023-11-23 14:44:02,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900224915] [2023-11-23 14:44:02,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:44:02,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-11-23 14:44:02,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:44:02,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-11-23 14:44:02,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=6471, Unknown=0, NotChecked=0, Total=7310 [2023-11-23 14:44:02,264 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 86 states, 86 states have (on average 2.63953488372093) internal successors, (227), 86 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:07,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:44:07,258 INFO L93 Difference]: Finished difference Result 217 states and 229 transitions. [2023-11-23 14:44:07,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-11-23 14:44:07,260 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.63953488372093) internal successors, (227), 86 states have internal predecessors, (227), 0 states have call successors, (0), 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 [2023-11-23 14:44:07,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:44:07,262 INFO L225 Difference]: With dead ends: 217 [2023-11-23 14:44:07,262 INFO L226 Difference]: Without dead ends: 95 [2023-11-23 14:44:07,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9814 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4321, Invalid=33899, Unknown=0, NotChecked=0, Total=38220 [2023-11-23 14:44:07,266 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 594 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 2168 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 2433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 2168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 14:44:07,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 430 Invalid, 2433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 2168 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 14:44:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-23 14:44:07,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2023-11-23 14:44:07,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:07,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2023-11-23 14:44:07,279 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 78 [2023-11-23 14:44:07,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:44:07,279 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2023-11-23 14:44:07,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.63953488372093) internal successors, (227), 86 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:07,280 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2023-11-23 14:44:07,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-23 14:44:07,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:44:07,280 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:44:07,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-23 14:44:07,486 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,SelfDestructingSolverStorable21 [2023-11-23 14:44:07,486 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:44:07,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:44:07,487 INFO L85 PathProgramCache]: Analyzing trace with hash -271586640, now seen corresponding path program 2 times [2023-11-23 14:44:07,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:44:07,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155214631] [2023-11-23 14:44:07,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:44:07,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:44:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:44:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 27 proven. 260 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-11-23 14:44:07,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:44:07,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155214631] [2023-11-23 14:44:07,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155214631] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:44:07,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588023073] [2023-11-23 14:44:07,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:44:07,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:44:07,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:44:07,639 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) [2023-11-23 14:44:07,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-23 14:44:07,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:44:07,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:44:07,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 14:44:07,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:44:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 27 proven. 260 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-11-23 14:44:07,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:44:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 27 proven. 260 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2023-11-23 14:44:08,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588023073] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:44:08,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:44:08,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2023-11-23 14:44:08,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765034109] [2023-11-23 14:44:08,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:44:08,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-23 14:44:08,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:44:08,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-23 14:44:08,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-11-23 14:44:08,019 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 31 states, 31 states have (on average 3.193548387096774) internal successors, (99), 31 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) [2023-11-23 14:44:08,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:44:08,238 INFO L93 Difference]: Finished difference Result 271 states and 304 transitions. [2023-11-23 14:44:08,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-23 14:44:08,239 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.193548387096774) internal successors, (99), 31 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) Word has length 87 [2023-11-23 14:44:08,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:44:08,239 INFO L225 Difference]: With dead ends: 271 [2023-11-23 14:44:08,239 INFO L226 Difference]: Without dead ends: 227 [2023-11-23 14:44:08,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2023-11-23 14:44:08,240 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 273 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:44:08,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 86 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:44:08,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-23 14:44:08,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 131. [2023-11-23 14:44:08,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.1307692307692307) internal successors, (147), 130 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) [2023-11-23 14:44:08,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 147 transitions. [2023-11-23 14:44:08,259 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 147 transitions. Word has length 87 [2023-11-23 14:44:08,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:44:08,259 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 147 transitions. [2023-11-23 14:44:08,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.193548387096774) internal successors, (99), 31 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) [2023-11-23 14:44:08,262 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 147 transitions. [2023-11-23 14:44:08,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-23 14:44:08,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:44:08,263 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:44:08,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-23 14:44:08,468 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,SelfDestructingSolverStorable22 [2023-11-23 14:44:08,468 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:44:08,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:44:08,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1168979918, now seen corresponding path program 19 times [2023-11-23 14:44:08,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:44:08,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713529961] [2023-11-23 14:44:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:44:08,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:44:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:44:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 509 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:09,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:44:09,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713529961] [2023-11-23 14:44:09,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713529961] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:44:09,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112336478] [2023-11-23 14:44:09,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 14:44:09,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:44:09,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:44:09,271 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) [2023-11-23 14:44:09,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-23 14:44:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:44:09,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-23 14:44:09,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:44:09,432 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 [2023-11-23 14:44:09,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:44:09,454 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 21 treesize of output 20 [2023-11-23 14:44:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 0 proven. 509 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:10,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:44:10,525 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 16 treesize of output 14 [2023-11-23 14:44:10,526 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 [2023-11-23 14:44:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 1 proven. 507 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 14:44:10,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112336478] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:44:10,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:44:10,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 31] total 76 [2023-11-23 14:44:10,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153388132] [2023-11-23 14:44:10,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:44:10,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-11-23 14:44:10,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:44:10,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-11-23 14:44:10,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=5313, Unknown=0, NotChecked=0, Total=5700 [2023-11-23 14:44:10,829 INFO L87 Difference]: Start difference. First operand 131 states and 147 transitions. Second operand has 76 states, 76 states have (on average 2.8026315789473686) internal successors, (213), 76 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:14,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:44:18,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:44:18,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:44:18,633 INFO L93 Difference]: Finished difference Result 185 states and 204 transitions. [2023-11-23 14:44:18,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-11-23 14:44:18,633 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.8026315789473686) internal successors, (213), 76 states have internal predecessors, (213), 0 states have call successors, (0), 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 87 [2023-11-23 14:44:18,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:44:18,634 INFO L225 Difference]: With dead ends: 185 [2023-11-23 14:44:18,634 INFO L226 Difference]: Without dead ends: 183 [2023-11-23 14:44:18,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3834 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=824, Invalid=12982, Unknown=0, NotChecked=0, Total=13806 [2023-11-23 14:44:18,636 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 31 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 3462 mSolverCounterSat, 50 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 3517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 3462 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:44:18,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 716 Invalid, 3517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 3462 Invalid, 5 Unknown, 0 Unchecked, 7.0s Time] [2023-11-23 14:44:18,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-23 14:44:18,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 134. [2023-11-23 14:44:18,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1278195488721805) internal successors, (150), 133 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:18,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 150 transitions. [2023-11-23 14:44:18,657 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 150 transitions. Word has length 87 [2023-11-23 14:44:18,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:44:18,658 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 150 transitions. [2023-11-23 14:44:18,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.8026315789473686) internal successors, (213), 76 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 150 transitions. [2023-11-23 14:44:18,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-23 14:44:18,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:44:18,658 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:44:18,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-23 14:44:18,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:44:18,871 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:44:18,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:44:18,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1480795889, now seen corresponding path program 20 times [2023-11-23 14:44:18,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:44:18,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601890715] [2023-11-23 14:44:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:44:18,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:44:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:44:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 547 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:19,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:44:19,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601890715] [2023-11-23 14:44:19,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601890715] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:44:19,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114378117] [2023-11-23 14:44:19,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:44:19,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:44:19,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:44:19,708 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) [2023-11-23 14:44:19,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-23 14:44:19,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:44:19,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:44:19,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-23 14:44:19,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:44:20,308 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 [2023-11-23 14:44:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 547 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:20,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:44:20,993 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 16 treesize of output 14 [2023-11-23 14:44:20,995 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 [2023-11-23 14:44:21,029 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 0 proven. 547 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:21,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114378117] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:44:21,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:44:21,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 64 [2023-11-23 14:44:21,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760668676] [2023-11-23 14:44:21,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:44:21,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-23 14:44:21,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:44:21,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-23 14:44:21,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=3813, Unknown=0, NotChecked=0, Total=4032 [2023-11-23 14:44:21,032 INFO L87 Difference]: Start difference. First operand 134 states and 150 transitions. Second operand has 64 states, 64 states have (on average 2.859375) internal successors, (183), 64 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:21,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:44:21,980 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2023-11-23 14:44:21,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-23 14:44:21,981 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.859375) internal successors, (183), 64 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-11-23 14:44:21,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:44:21,981 INFO L225 Difference]: With dead ends: 141 [2023-11-23 14:44:21,981 INFO L226 Difference]: Without dead ends: 139 [2023-11-23 14:44:21,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=439, Invalid=8117, Unknown=0, NotChecked=0, Total=8556 [2023-11-23 14:44:21,982 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 2984 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 3015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 14:44:21,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 626 Invalid, 3015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2984 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 14:44:21,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-23 14:44:22,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2023-11-23 14:44:22,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.125) internal successors, (153), 136 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) [2023-11-23 14:44:22,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 153 transitions. [2023-11-23 14:44:22,004 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 153 transitions. Word has length 90 [2023-11-23 14:44:22,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:44:22,004 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 153 transitions. [2023-11-23 14:44:22,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.859375) internal successors, (183), 64 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:22,004 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 153 transitions. [2023-11-23 14:44:22,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-23 14:44:22,005 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:44:22,005 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:44:22,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-23 14:44:22,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:44:22,210 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:44:22,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:44:22,210 INFO L85 PathProgramCache]: Analyzing trace with hash -776126702, now seen corresponding path program 21 times [2023-11-23 14:44:22,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:44:22,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406911784] [2023-11-23 14:44:22,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:44:22,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:44:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:44:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 261 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:22,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:44:22,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406911784] [2023-11-23 14:44:22,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406911784] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:44:22,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491468674] [2023-11-23 14:44:22,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 14:44:22,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:44:22,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:44:22,675 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) [2023-11-23 14:44:22,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-23 14:44:23,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-11-23 14:44:23,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:44:23,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-23 14:44:23,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:44:23,570 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 301 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:23,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:44:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 301 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:23,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491468674] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:44:23,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:44:23,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-11-23 14:44:23,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164065168] [2023-11-23 14:44:23,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:44:23,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-23 14:44:23,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:44:23,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-23 14:44:23,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-11-23 14:44:23,902 INFO L87 Difference]: Start difference. First operand 137 states and 153 transitions. Second operand has 50 states, 50 states have (on average 2.9) internal successors, (145), 50 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:44:24,187 INFO L93 Difference]: Finished difference Result 192 states and 208 transitions. [2023-11-23 14:44:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-23 14:44:24,188 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.9) internal successors, (145), 50 states have internal predecessors, (145), 0 states have call successors, (0), 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 93 [2023-11-23 14:44:24,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:44:24,188 INFO L225 Difference]: With dead ends: 192 [2023-11-23 14:44:24,189 INFO L226 Difference]: Without dead ends: 143 [2023-11-23 14:44:24,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 140 SyntacticMatches, 29 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2023-11-23 14:44:24,190 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 107 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:44:24,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 164 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:44:24,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-23 14:44:24,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2023-11-23 14:44:24,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.1176470588235294) internal successors, (152), 136 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) [2023-11-23 14:44:24,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 152 transitions. [2023-11-23 14:44:24,211 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 152 transitions. Word has length 93 [2023-11-23 14:44:24,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:44:24,211 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 152 transitions. [2023-11-23 14:44:24,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.9) internal successors, (145), 50 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:24,211 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 152 transitions. [2023-11-23 14:44:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-23 14:44:24,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:44:24,212 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:44:24,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-23 14:44:24,418 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,SelfDestructingSolverStorable25 [2023-11-23 14:44:24,418 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:44:24,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:44:24,418 INFO L85 PathProgramCache]: Analyzing trace with hash 785169714, now seen corresponding path program 22 times [2023-11-23 14:44:24,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:44:24,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711210229] [2023-11-23 14:44:24,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:44:24,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:44:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:44:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:25,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:44:25,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711210229] [2023-11-23 14:44:25,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711210229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:44:25,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435672047] [2023-11-23 14:44:25,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 14:44:25,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:44:25,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:44:25,147 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) [2023-11-23 14:44:25,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-23 14:44:25,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 14:44:25,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:44:25,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-23 14:44:25,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:44:25,295 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 [2023-11-23 14:44:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:25,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:44:25,964 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 16 treesize of output 14 [2023-11-23 14:44:25,966 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 [2023-11-23 14:44:26,001 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:26,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435672047] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:44:26,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:44:26,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 52 [2023-11-23 14:44:26,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898068621] [2023-11-23 14:44:26,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:44:26,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-23 14:44:26,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:44:26,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-23 14:44:26,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2498, Unknown=0, NotChecked=0, Total=2652 [2023-11-23 14:44:26,002 INFO L87 Difference]: Start difference. First operand 137 states and 152 transitions. Second operand has 52 states, 52 states have (on average 2.8076923076923075) internal successors, (146), 52 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:44:27,453 INFO L93 Difference]: Finished difference Result 144 states and 159 transitions. [2023-11-23 14:44:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-23 14:44:27,454 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.8076923076923075) internal successors, (146), 52 states have internal predecessors, (146), 0 states have call successors, (0), 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 96 [2023-11-23 14:44:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:44:27,454 INFO L225 Difference]: With dead ends: 144 [2023-11-23 14:44:27,454 INFO L226 Difference]: Without dead ends: 142 [2023-11-23 14:44:27,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=351, Invalid=6621, Unknown=0, NotChecked=0, Total=6972 [2023-11-23 14:44:27,455 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 15 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 3055 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 3089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 3055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 14:44:27,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 582 Invalid, 3089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 3055 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 14:44:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-23 14:44:27,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2023-11-23 14:44:27,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1151079136690647) internal successors, (155), 139 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:27,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 155 transitions. [2023-11-23 14:44:27,478 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 155 transitions. Word has length 96 [2023-11-23 14:44:27,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:44:27,478 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 155 transitions. [2023-11-23 14:44:27,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.8076923076923075) internal successors, (146), 52 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:27,479 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 155 transitions. [2023-11-23 14:44:27,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-23 14:44:27,479 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:44:27,479 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:44:27,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-23 14:44:27,690 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,SelfDestructingSolverStorable26 [2023-11-23 14:44:27,690 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:44:27,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:44:27,691 INFO L85 PathProgramCache]: Analyzing trace with hash 604161039, now seen corresponding path program 23 times [2023-11-23 14:44:27,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:44:27,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36462562] [2023-11-23 14:44:27,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:44:27,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:44:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:44:28,209 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 302 proven. 373 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:28,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:44:28,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36462562] [2023-11-23 14:44:28,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36462562] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:44:28,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702800140] [2023-11-23 14:44:28,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 14:44:28,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:44:28,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:44:28,220 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) [2023-11-23 14:44:28,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-23 14:44:28,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-11-23 14:44:28,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:44:28,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-23 14:44:28,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:44:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 345 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:29,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:44:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 345 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:29,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702800140] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:44:29,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:44:29,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2023-11-23 14:44:29,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562454409] [2023-11-23 14:44:29,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:44:29,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-23 14:44:29,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:44:29,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-23 14:44:29,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2023-11-23 14:44:29,314 INFO L87 Difference]: Start difference. First operand 140 states and 155 transitions. Second operand has 53 states, 53 states have (on average 2.9056603773584904) internal successors, (154), 53 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:29,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:44:29,530 INFO L93 Difference]: Finished difference Result 198 states and 213 transitions. [2023-11-23 14:44:29,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-23 14:44:29,530 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.9056603773584904) internal successors, (154), 53 states have internal predecessors, (154), 0 states have call successors, (0), 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 99 [2023-11-23 14:44:29,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:44:29,531 INFO L225 Difference]: With dead ends: 198 [2023-11-23 14:44:29,531 INFO L226 Difference]: Without dead ends: 146 [2023-11-23 14:44:29,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 149 SyntacticMatches, 31 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2023-11-23 14:44:29,532 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 147 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:44:29,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 165 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:44:29,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-23 14:44:29,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2023-11-23 14:44:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1079136690647482) internal successors, (154), 139 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:29,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2023-11-23 14:44:29,555 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 99 [2023-11-23 14:44:29,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:44:29,555 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2023-11-23 14:44:29,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.9056603773584904) internal successors, (154), 53 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:29,555 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2023-11-23 14:44:29,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-23 14:44:29,555 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:44:29,556 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:44:29,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-23 14:44:29,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-23 14:44:29,764 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:44:29,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:44:29,765 INFO L85 PathProgramCache]: Analyzing trace with hash 667101743, now seen corresponding path program 24 times [2023-11-23 14:44:29,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:44:29,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688572546] [2023-11-23 14:44:29,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:44:29,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:44:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:44:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:30,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:44:30,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688572546] [2023-11-23 14:44:30,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688572546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:44:30,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113002239] [2023-11-23 14:44:30,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 14:44:30,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:44:30,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:44:30,469 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) [2023-11-23 14:44:30,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-23 14:44:32,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-11-23 14:44:32,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:44:32,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-23 14:44:32,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:44:33,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-23 14:44:34,274 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-23 14:44:34,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 23 [2023-11-23 14:44:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 330 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:34,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:44:35,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-23 14:44:35,732 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 18 treesize of output 12 [2023-11-23 14:44:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 315 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:36,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113002239] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:44:36,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:44:36,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 40, 38] total 110 [2023-11-23 14:44:36,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589268661] [2023-11-23 14:44:36,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:44:36,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2023-11-23 14:44:36,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:44:36,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2023-11-23 14:44:36,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1325, Invalid=10665, Unknown=0, NotChecked=0, Total=11990 [2023-11-23 14:44:36,701 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 110 states, 110 states have (on average 2.7181818181818183) internal successors, (299), 110 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:44,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:44:44,510 INFO L93 Difference]: Finished difference Result 257 states and 275 transitions. [2023-11-23 14:44:44,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2023-11-23 14:44:44,511 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.7181818181818183) internal successors, (299), 110 states have internal predecessors, (299), 0 states have call successors, (0), 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 102 [2023-11-23 14:44:44,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:44:44,511 INFO L225 Difference]: With dead ends: 257 [2023-11-23 14:44:44,512 INFO L226 Difference]: Without dead ends: 150 [2023-11-23 14:44:44,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16324 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=6607, Invalid=56645, Unknown=0, NotChecked=0, Total=63252 [2023-11-23 14:44:44,515 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 713 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 3796 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 713 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 4106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 3796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 14:44:44,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [713 Valid, 720 Invalid, 4106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 3796 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 14:44:44,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-23 14:44:44,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2023-11-23 14:44:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.091549295774648) internal successors, (155), 142 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:44,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 155 transitions. [2023-11-23 14:44:44,562 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 155 transitions. Word has length 102 [2023-11-23 14:44:44,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:44:44,563 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 155 transitions. [2023-11-23 14:44:44,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.7181818181818183) internal successors, (299), 110 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:44,563 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 155 transitions. [2023-11-23 14:44:44,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-23 14:44:44,563 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:44:44,564 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:44:44,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-23 14:44:44,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-23 14:44:44,778 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:44:44,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:44:44,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1115970062, now seen corresponding path program 25 times [2023-11-23 14:44:44,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:44:44,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960347844] [2023-11-23 14:44:44,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:44:44,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:44:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:44:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 1 proven. 868 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:45,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:44:45,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960347844] [2023-11-23 14:44:45,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960347844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:44:45,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025698776] [2023-11-23 14:44:45,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 14:44:45,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:44:45,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:44:45,815 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) [2023-11-23 14:44:45,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-23 14:44:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:44:45,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-23 14:44:45,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:44:46,563 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 [2023-11-23 14:44:46,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:44:46,652 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 21 treesize of output 20 [2023-11-23 14:44:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 0 proven. 869 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:47,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:44:48,036 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 16 treesize of output 14 [2023-11-23 14:44:48,037 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 16 treesize of output 12 [2023-11-23 14:44:48,080 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 1 proven. 867 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 14:44:48,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025698776] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:44:48,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:44:48,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 39] total 79 [2023-11-23 14:44:48,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691583567] [2023-11-23 14:44:48,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:44:48,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-11-23 14:44:48,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:44:48,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-11-23 14:44:48,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=5863, Unknown=0, NotChecked=0, Total=6162 [2023-11-23 14:44:48,082 INFO L87 Difference]: Start difference. First operand 143 states and 155 transitions. Second operand has 79 states, 79 states have (on average 2.848101265822785) internal successors, (225), 79 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:53,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:44:55,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:44:57,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:45:00,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:45:01,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:45:01,358 INFO L93 Difference]: Finished difference Result 209 states and 224 transitions. [2023-11-23 14:45:01,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-11-23 14:45:01,358 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.848101265822785) internal successors, (225), 79 states have internal predecessors, (225), 0 states have call successors, (0), 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 111 [2023-11-23 14:45:01,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:45:01,359 INFO L225 Difference]: With dead ends: 209 [2023-11-23 14:45:01,359 INFO L226 Difference]: Without dead ends: 207 [2023-11-23 14:45:01,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6094 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=900, Invalid=21152, Unknown=0, NotChecked=0, Total=22052 [2023-11-23 14:45:01,361 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 145 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 4597 mSolverCounterSat, 88 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 4690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 4597 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2023-11-23 14:45:01,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1007 Invalid, 4690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 4597 Invalid, 5 Unknown, 0 Unchecked, 11.9s Time] [2023-11-23 14:45:01,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-23 14:45:01,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 146. [2023-11-23 14:45:01,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.089655172413793) internal successors, (158), 145 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:45:01,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 158 transitions. [2023-11-23 14:45:01,397 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 158 transitions. Word has length 111 [2023-11-23 14:45:01,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:45:01,397 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 158 transitions. [2023-11-23 14:45:01,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.848101265822785) internal successors, (225), 79 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:45:01,397 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 158 transitions. [2023-11-23 14:45:01,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-23 14:45:01,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:45:01,398 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:45:01,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-23 14:45:01,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:45:01,610 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:45:01,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:45:01,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1482826575, now seen corresponding path program 26 times [2023-11-23 14:45:01,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:45:01,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677813575] [2023-11-23 14:45:01,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:45:01,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:45:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:45:02,611 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 0 proven. 919 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:45:02,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:45:02,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677813575] [2023-11-23 14:45:02,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677813575] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:45:02,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952810213] [2023-11-23 14:45:02,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:45:02,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:45:02,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:45:02,613 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) [2023-11-23 14:45:02,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-23 14:45:02,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:45:02,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:45:02,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-23 14:45:02,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:45:03,455 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 [2023-11-23 14:45:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 0 proven. 919 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:45:04,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:45:04,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-11-23 14:45:04,467 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 [2023-11-23 14:45:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 0 proven. 919 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:45:04,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952810213] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:45:04,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:45:04,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 80 [2023-11-23 14:45:04,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623058331] [2023-11-23 14:45:04,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:45:04,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-11-23 14:45:04,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:45:04,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-11-23 14:45:04,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=6045, Unknown=0, NotChecked=0, Total=6320 [2023-11-23 14:45:04,497 INFO L87 Difference]: Start difference. First operand 146 states and 158 transitions. Second operand has 80 states, 80 states have (on average 2.8875) internal successors, (231), 80 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:45:06,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:45:06,243 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2023-11-23 14:45:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-23 14:45:06,244 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.8875) internal successors, (231), 80 states have internal predecessors, (231), 0 states have call successors, (0), 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 114 [2023-11-23 14:45:06,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:45:06,244 INFO L225 Difference]: With dead ends: 153 [2023-11-23 14:45:06,245 INFO L226 Difference]: Without dead ends: 151 [2023-11-23 14:45:06,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3010 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=555, Invalid=13017, Unknown=0, NotChecked=0, Total=13572 [2023-11-23 14:45:06,246 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 4870 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 4909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 4870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:45:06,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 1019 Invalid, 4909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 4870 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 14:45:06,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-23 14:45:06,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2023-11-23 14:45:06,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.087837837837838) internal successors, (161), 148 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:45:06,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 161 transitions. [2023-11-23 14:45:06,275 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 161 transitions. Word has length 114 [2023-11-23 14:45:06,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:45:06,275 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 161 transitions. [2023-11-23 14:45:06,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.8875) internal successors, (231), 80 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:45:06,275 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 161 transitions. [2023-11-23 14:45:06,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-23 14:45:06,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:45:06,276 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:45:06,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-23 14:45:06,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:45:06,480 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:45:06,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:45:06,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1152961746, now seen corresponding path program 27 times [2023-11-23 14:45:06,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:45:06,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002803578] [2023-11-23 14:45:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:45:06,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:45:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:45:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 443 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:45:07,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:45:07,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002803578] [2023-11-23 14:45:07,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002803578] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:45:07,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991609783] [2023-11-23 14:45:07,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 14:45:07,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:45:07,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:45:07,186 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) [2023-11-23 14:45:07,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-23 14:45:07,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2023-11-23 14:45:07,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:45:07,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-23 14:45:07,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:45:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 495 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:45:08,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:45:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 495 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:45:08,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991609783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:45:08,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:45:08,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 62 [2023-11-23 14:45:08,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707810409] [2023-11-23 14:45:08,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:45:08,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-23 14:45:08,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:45:08,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-23 14:45:08,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=2897, Unknown=0, NotChecked=0, Total=3782 [2023-11-23 14:45:08,810 INFO L87 Difference]: Start difference. First operand 149 states and 161 transitions. Second operand has 62 states, 62 states have (on average 2.9193548387096775) internal successors, (181), 62 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:45:09,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:45:09,110 INFO L93 Difference]: Finished difference Result 216 states and 228 transitions. [2023-11-23 14:45:09,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-23 14:45:09,111 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.9193548387096775) internal successors, (181), 62 states have internal predecessors, (181), 0 states have call successors, (0), 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 117 [2023-11-23 14:45:09,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:45:09,111 INFO L225 Difference]: With dead ends: 216 [2023-11-23 14:45:09,111 INFO L226 Difference]: Without dead ends: 155 [2023-11-23 14:45:09,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 176 SyntacticMatches, 37 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2983 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1512, Invalid=4968, Unknown=0, NotChecked=0, Total=6480 [2023-11-23 14:45:09,112 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 221 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:45:09,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 160 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:45:09,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-23 14:45:09,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 149. [2023-11-23 14:45:09,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0810810810810811) internal successors, (160), 148 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) [2023-11-23 14:45:09,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2023-11-23 14:45:09,141 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 117 [2023-11-23 14:45:09,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:45:09,141 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2023-11-23 14:45:09,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.9193548387096775) internal successors, (181), 62 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:45:09,141 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2023-11-23 14:45:09,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-11-23 14:45:09,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:45:09,142 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:45:09,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-23 14:45:09,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-23 14:45:09,349 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:45:09,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:45:09,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1891101426, now seen corresponding path program 28 times [2023-11-23 14:45:09,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:45:09,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050906998] [2023-11-23 14:45:09,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:45:09,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:45:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:45:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:45:10,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:45:10,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050906998] [2023-11-23 14:45:10,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050906998] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:45:10,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321294218] [2023-11-23 14:45:10,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 14:45:10,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:45:10,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:45:10,392 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:45:10,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-23 14:45:10,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 14:45:10,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:45:10,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 91 conjunts are in the unsatisfiable core [2023-11-23 14:45:10,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:45:10,620 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 [2023-11-23 14:45:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:45:11,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:45:11,584 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 16 treesize of output 14 [2023-11-23 14:45:11,585 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 [2023-11-23 14:45:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:45:11,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321294218] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:45:11,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:45:11,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 64 [2023-11-23 14:45:11,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067825895] [2023-11-23 14:45:11,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:45:11,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-23 14:45:11,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:45:11,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-23 14:45:11,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3842, Unknown=0, NotChecked=0, Total=4032 [2023-11-23 14:45:11,632 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand has 64 states, 64 states have (on average 2.84375) internal successors, (182), 64 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:45:13,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:45:13,472 INFO L93 Difference]: Finished difference Result 156 states and 167 transitions. [2023-11-23 14:45:13,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-11-23 14:45:13,473 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.84375) internal successors, (182), 64 states have internal predecessors, (182), 0 states have call successors, (0), 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 120 [2023-11-23 14:45:13,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:45:13,474 INFO L225 Difference]: With dead ends: 156 [2023-11-23 14:45:13,474 INFO L226 Difference]: Without dead ends: 154 [2023-11-23 14:45:13,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1936 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=435, Invalid=10277, Unknown=0, NotChecked=0, Total=10712 [2023-11-23 14:45:13,475 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 4497 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 4539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 4497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:45:13,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 862 Invalid, 4539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 4497 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 14:45:13,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-23 14:45:13,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2023-11-23 14:45:13,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0794701986754967) internal successors, (163), 151 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) [2023-11-23 14:45:13,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 163 transitions. [2023-11-23 14:45:13,521 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 163 transitions. Word has length 120 [2023-11-23 14:45:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:45:13,521 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 163 transitions. [2023-11-23 14:45:13,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.84375) internal successors, (182), 64 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:45:13,522 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 163 transitions. [2023-11-23 14:45:13,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-23 14:45:13,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:45:13,522 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:45:13,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-23 14:45:13,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:45:13,734 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:45:13,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:45:13,734 INFO L85 PathProgramCache]: Analyzing trace with hash 721665615, now seen corresponding path program 29 times [2023-11-23 14:45:13,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:45:13,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94442154] [2023-11-23 14:45:13,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:45:13,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:45:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:45:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 496 proven. 587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:45:14,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:45:14,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94442154] [2023-11-23 14:45:14,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94442154] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:45:14,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92162344] [2023-11-23 14:45:14,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 14:45:14,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:45:14,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:45:14,275 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:45:14,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-23 14:45:14,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-11-23 14:45:14,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:45:14,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-23 14:45:14,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:45:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 551 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:45:15,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:45:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 551 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:45:15,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92162344] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:45:15,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:45:15,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2023-11-23 14:45:15,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524868140] [2023-11-23 14:45:15,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:45:15,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-23 14:45:15,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:45:15,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-23 14:45:15,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=3189, Unknown=0, NotChecked=0, Total=4160 [2023-11-23 14:45:15,643 INFO L87 Difference]: Start difference. First operand 152 states and 163 transitions. Second operand has 65 states, 65 states have (on average 2.923076923076923) internal successors, (190), 65 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:45:16,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:45:16,006 INFO L93 Difference]: Finished difference Result 222 states and 233 transitions. [2023-11-23 14:45:16,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-23 14:45:16,006 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.923076923076923) internal successors, (190), 65 states have internal predecessors, (190), 0 states have call successors, (0), 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 123 [2023-11-23 14:45:16,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:45:16,007 INFO L225 Difference]: With dead ends: 222 [2023-11-23 14:45:16,007 INFO L226 Difference]: Without dead ends: 158 [2023-11-23 14:45:16,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 185 SyntacticMatches, 39 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3291 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1661, Invalid=5479, Unknown=0, NotChecked=0, Total=7140 [2023-11-23 14:45:16,008 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 207 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:45:16,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 180 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 14:45:16,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-23 14:45:16,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2023-11-23 14:45:16,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0728476821192052) internal successors, (162), 151 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:45:16,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 162 transitions. [2023-11-23 14:45:16,038 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 162 transitions. Word has length 123 [2023-11-23 14:45:16,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:45:16,038 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 162 transitions. [2023-11-23 14:45:16,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.923076923076923) internal successors, (190), 65 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:45:16,039 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 162 transitions. [2023-11-23 14:45:16,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-23 14:45:16,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:45:16,039 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:45:16,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-23 14:45:16,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:45:16,253 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:45:16,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:45:16,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1283734417, now seen corresponding path program 30 times [2023-11-23 14:45:16,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:45:16,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346687797] [2023-11-23 14:45:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:45:16,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:45:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:45:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 0 proven. 1141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:45:17,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:45:17,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346687797] [2023-11-23 14:45:17,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346687797] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:45:17,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999325435] [2023-11-23 14:45:17,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 14:45:17,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:45:17,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:45:17,221 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 14:45:17,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-23 14:45:20,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2023-11-23 14:45:20,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:45:20,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 123 conjunts are in the unsatisfiable core [2023-11-23 14:45:20,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:45:21,152 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 [2023-11-23 14:45:21,257 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 [2023-11-23 14:45:21,383 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:45:21,383 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 [2023-11-23 14:45:21,531 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:45:21,532 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 [2023-11-23 14:45:21,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:45:21,639 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 [2023-11-23 14:45:21,757 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:45:21,757 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 [2023-11-23 14:45:21,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:45:21,885 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 [2023-11-23 14:45:22,045 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:45:22,045 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 [2023-11-23 14:45:22,201 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:45:22,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2023-11-23 14:45:22,439 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:45:22,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 98 [2023-11-23 14:45:22,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:45:22,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 55 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 82 treesize of output 108 [2023-11-23 14:45:22,878 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:45:22,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 66 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 89 treesize of output 118 [2023-11-23 14:45:23,107 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:45:23,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 78 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 96 treesize of output 128 [2023-11-23 14:45:23,464 INFO L349 Elim1Store]: treesize reduction 208, result has 30.7 percent of original size [2023-11-23 14:45:23,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 78 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 91 case distinctions, treesize of input 105 treesize of output 140 [2023-11-23 14:45:23,954 INFO L349 Elim1Store]: treesize reduction 330, result has 23.4 percent of original size [2023-11-23 14:45:23,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 78 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 105 case distinctions, treesize of input 114 treesize of output 152 [2023-11-23 14:45:24,584 INFO L349 Elim1Store]: treesize reduction 460, result has 19.3 percent of original size [2023-11-23 14:45:24,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 78 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 120 case distinctions, treesize of input 123 treesize of output 164 [2023-11-23 14:45:25,369 INFO L349 Elim1Store]: treesize reduction 598, result has 16.6 percent of original size [2023-11-23 14:45:25,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 78 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 136 case distinctions, treesize of input 132 treesize of output 176 [2023-11-23 14:45:26,613 INFO L349 Elim1Store]: treesize reduction 744, result has 14.7 percent of original size [2023-11-23 14:45:26,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 17 select indices, 17 select index equivalence classes, 78 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 153 case distinctions, treesize of input 141 treesize of output 188 [2023-11-23 14:45:28,397 INFO L349 Elim1Store]: treesize reduction 898, result has 13.2 percent of original size [2023-11-23 14:45:28,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 78 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 171 case distinctions, treesize of input 150 treesize of output 200 [2023-11-23 14:46:11,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,388 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 14:46:11,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:46:11,418 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 14:46:11,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 171 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 190 case distinctions, treesize of input 174 treesize of output 77 [2023-11-23 14:46:11,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 174 proven. 967 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:46:11,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... Killed by 15