./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/array-tiling/nr2.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/nr2.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 2a5d4c3d8db636946363c81d25b5c2e381fc236cdcde6b4765d7ce6e059d8a21 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-c4f9136-m [2023-11-23 14:43:14,523 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 14:43:14,588 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-23 14:43:14,592 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 14:43:14,593 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 14:43:14,618 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 14:43:14,618 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 14:43:14,619 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 14:43:14,619 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-23 14:43:14,622 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-23 14:43:14,623 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 14:43:14,623 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 14:43:14,624 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 14:43:14,625 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 14:43:14,625 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 14:43:14,625 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 14:43:14,626 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 14:43:14,626 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 14:43:14,626 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 14:43:14,626 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 14:43:14,626 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 14:43:14,627 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 14:43:14,627 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 14:43:14,627 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 14:43:14,627 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 14:43:14,628 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 14:43:14,628 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 14:43:14,628 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 14:43:14,629 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 14:43:14,629 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 14:43:14,630 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 14:43:14,630 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 14:43:14,630 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 14:43:14,630 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 14:43:14,630 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 14:43:14,631 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 14:43:14,631 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 14:43:14,631 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 14:43:14,631 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 14:43:14,631 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 14:43:14,632 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 14:43:14,632 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 14:43:14,632 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a5d4c3d8db636946363c81d25b5c2e381fc236cdcde6b4765d7ce6e059d8a21 [2023-11-23 14:43:14,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 14:43:14,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 14:43:14,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 14:43:14,872 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 14:43:14,873 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 14:43:14,873 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/nr2.c [2023-11-23 14:43:15,999 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 14:43:16,168 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 14:43:16,169 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/nr2.c [2023-11-23 14:43:16,175 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b44750d4/e2b2a14e73a44abf80b7fc35349ec455/FLAGc1f3c8a30 [2023-11-23 14:43:16,187 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b44750d4/e2b2a14e73a44abf80b7fc35349ec455 [2023-11-23 14:43:16,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 14:43:16,190 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 14:43:16,193 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 14:43:16,193 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 14:43:16,196 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 14:43:16,197 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:43:16" (1/1) ... [2023-11-23 14:43:16,198 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ac0f7b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:16, skipping insertion in model container [2023-11-23 14:43:16,198 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:43:16" (1/1) ... [2023-11-23 14:43:16,217 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 14:43:16,379 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/nr2.c[394,407] [2023-11-23 14:43:16,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 14:43:16,397 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 14:43:16,414 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/nr2.c[394,407] [2023-11-23 14:43:16,420 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 14:43:16,430 INFO L206 MainTranslator]: Completed translation [2023-11-23 14:43:16,430 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:16 WrapperNode [2023-11-23 14:43:16,431 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 14:43:16,431 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 14:43:16,432 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 14:43:16,432 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 14:43:16,436 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:16" (1/1) ... [2023-11-23 14:43:16,441 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:16" (1/1) ... [2023-11-23 14:43:16,455 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2023-11-23 14:43:16,456 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 14:43:16,456 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 14:43:16,456 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 14:43:16,456 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 14:43:16,463 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:16" (1/1) ... [2023-11-23 14:43:16,464 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:16" (1/1) ... [2023-11-23 14:43:16,465 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:16" (1/1) ... [2023-11-23 14:43:16,474 INFO L175 MemorySlicer]: Split 12 memory accesses to 3 slices as follows [2, 6, 4]. 50 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6, 0]. The 2 writes are split as follows [0, 0, 2]. [2023-11-23 14:43:16,474 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:16" (1/1) ... [2023-11-23 14:43:16,474 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:16" (1/1) ... [2023-11-23 14:43:16,478 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:16" (1/1) ... [2023-11-23 14:43:16,480 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:16" (1/1) ... [2023-11-23 14:43:16,493 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:16" (1/1) ... [2023-11-23 14:43:16,494 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:16" (1/1) ... [2023-11-23 14:43:16,495 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 14:43:16,496 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 14:43:16,496 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 14:43:16,496 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 14:43:16,496 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:16" (1/1) ... [2023-11-23 14:43:16,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 14:43:16,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:16,533 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 14:43:16,535 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 14:43:16,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 14:43:16,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-23 14:43:16,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-23 14:43:16,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-23 14:43:16,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 14:43:16,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-23 14:43:16,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-23 14:43:16,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-23 14:43:16,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 14:43:16,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 14:43:16,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-23 14:43:16,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-23 14:43:16,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-23 14:43:16,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 14:43:16,640 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 14:43:16,642 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 14:43:16,771 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 14:43:16,788 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 14:43:16,788 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 14:43:16,789 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:43:16 BoogieIcfgContainer [2023-11-23 14:43:16,789 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 14:43:16,790 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 14:43:16,790 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 14:43:16,793 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 14:43:16,793 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:43:16" (1/3) ... [2023-11-23 14:43:16,794 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4af78b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:43:16, skipping insertion in model container [2023-11-23 14:43:16,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:43:16" (2/3) ... [2023-11-23 14:43:16,794 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4af78b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:43:16, skipping insertion in model container [2023-11-23 14:43:16,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:43:16" (3/3) ... [2023-11-23 14:43:16,795 INFO L112 eAbstractionObserver]: Analyzing ICFG nr2.c [2023-11-23 14:43:16,809 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 14:43:16,809 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 14:43:16,840 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 14:43:16,845 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;@79a9c1dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 14:43:16,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 14:43:16,848 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:16,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 14:43:16,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:16,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:16,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:16,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:16,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2106680282, now seen corresponding path program 1 times [2023-11-23 14:43:16,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:16,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141171208] [2023-11-23 14:43:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:16,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:16,980 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 14:43:16,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:16,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141171208] [2023-11-23 14:43:16,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141171208] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:43:16,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:43:16,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 14:43:16,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512642327] [2023-11-23 14:43:16,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:43:16,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-23 14:43:16,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:17,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-23 14:43:17,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-23 14:43:17,008 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.65) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 14:43:17,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:17,023 INFO L93 Difference]: Finished difference Result 40 states and 59 transitions. [2023-11-23 14:43:17,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-23 14:43:17,025 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 14:43:17,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:17,030 INFO L225 Difference]: With dead ends: 40 [2023-11-23 14:43:17,031 INFO L226 Difference]: Without dead ends: 18 [2023-11-23 14:43:17,033 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 14:43:17,035 INFO L413 NwaCegarLoop]: 25 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, 25 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 14:43:17,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:43:17,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-23 14:43:17,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-23 14:43:17,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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 14:43:17,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2023-11-23 14:43:17,058 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2023-11-23 14:43:17,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:17,058 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2023-11-23 14:43:17,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 14:43:17,058 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2023-11-23 14:43:17,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 14:43:17,059 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:17,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:17,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 14:43:17,059 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:17,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:17,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1426621912, now seen corresponding path program 1 times [2023-11-23 14:43:17,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:17,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193125689] [2023-11-23 14:43:17,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:17,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:17,353 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 14:43:17,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:17,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193125689] [2023-11-23 14:43:17,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193125689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:43:17,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:43:17,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 14:43:17,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149380001] [2023-11-23 14:43:17,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:43:17,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 14:43:17,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:17,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 14:43:17,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 14:43:17,356 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 14:43:17,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:17,384 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2023-11-23 14:43:17,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 14:43:17,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 14:43:17,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:17,385 INFO L225 Difference]: With dead ends: 23 [2023-11-23 14:43:17,386 INFO L226 Difference]: Without dead ends: 21 [2023-11-23 14:43:17,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 14:43:17,387 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:17,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 51 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:43:17,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-23 14:43:17,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-11-23 14:43:17,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 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 14:43:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-23 14:43:17,390 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2023-11-23 14:43:17,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:17,391 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-23 14:43:17,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 14:43:17,391 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-23 14:43:17,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 14:43:17,391 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:17,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:17,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 14:43:17,392 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:17,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:17,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1426562330, now seen corresponding path program 1 times [2023-11-23 14:43:17,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:17,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073958087] [2023-11-23 14:43:17,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:17,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:17,536 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 14:43:17,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:17,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073958087] [2023-11-23 14:43:17,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073958087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:43:17,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:43:17,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 14:43:17,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437626358] [2023-11-23 14:43:17,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:43:17,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 14:43:17,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:17,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 14:43:17,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 14:43:17,538 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 14:43:17,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:17,562 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-11-23 14:43:17,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 14:43:17,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 14:43:17,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:17,563 INFO L225 Difference]: With dead ends: 35 [2023-11-23 14:43:17,563 INFO L226 Difference]: Without dead ends: 25 [2023-11-23 14:43:17,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 14:43:17,565 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:17,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:43:17,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-23 14:43:17,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2023-11-23 14:43:17,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:17,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-11-23 14:43:17,569 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2023-11-23 14:43:17,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:17,569 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-11-23 14:43:17,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 14:43:17,569 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-11-23 14:43:17,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 14:43:17,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:17,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:17,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 14:43:17,570 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:17,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:17,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1008841274, now seen corresponding path program 1 times [2023-11-23 14:43:17,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:17,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825520816] [2023-11-23 14:43:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:17,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:17,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:17,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825520816] [2023-11-23 14:43:17,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825520816] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:43:17,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 14:43:17,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 14:43:17,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479891868] [2023-11-23 14:43:17,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:43:17,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 14:43:17,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:17,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 14:43:17,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 14:43:17,610 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 14:43:17,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:17,630 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-11-23 14:43:17,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 14:43:17,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) Word has length 15 [2023-11-23 14:43:17,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:17,632 INFO L225 Difference]: With dead ends: 39 [2023-11-23 14:43:17,632 INFO L226 Difference]: Without dead ends: 24 [2023-11-23 14:43:17,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 14:43:17,635 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:17,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:43:17,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-23 14:43:17,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-11-23 14:43:17,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-11-23 14:43:17,644 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2023-11-23 14:43:17,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:17,645 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-11-23 14:43:17,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 14:43:17,645 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-11-23 14:43:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 14:43:17,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:17,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:17,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 14:43:17,647 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:17,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:17,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1963751443, now seen corresponding path program 1 times [2023-11-23 14:43:17,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:17,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2340300] [2023-11-23 14:43:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:17,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:17,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:17,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2340300] [2023-11-23 14:43:17,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2340300] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:17,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652638223] [2023-11-23 14:43:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:17,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:17,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:17,713 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 14:43:17,714 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 14:43:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:17,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 14:43:17,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:17,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:17,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652638223] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:17,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:17,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-11-23 14:43:17,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965723909] [2023-11-23 14:43:17,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:17,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 14:43:17,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:17,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 14:43:17,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 14:43:17,865 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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 14:43:17,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:17,885 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2023-11-23 14:43:17,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 14:43:17,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 14:43:17,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:17,886 INFO L225 Difference]: With dead ends: 41 [2023-11-23 14:43:17,887 INFO L226 Difference]: Without dead ends: 25 [2023-11-23 14:43:17,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-23 14:43:17,888 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:17,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 42 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:43:17,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-23 14:43:17,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-23 14:43:17,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 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 14:43:17,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-11-23 14:43:17,895 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 18 [2023-11-23 14:43:17,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:17,896 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-11-23 14:43:17,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 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 14:43:17,896 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-11-23 14:43:17,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 14:43:17,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:17,897 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:17,924 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 14:43:18,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:18,110 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:18,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:18,116 INFO L85 PathProgramCache]: Analyzing trace with hash -542707366, now seen corresponding path program 2 times [2023-11-23 14:43:18,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:18,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184118799] [2023-11-23 14:43:18,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:18,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:18,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:18,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184118799] [2023-11-23 14:43:18,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184118799] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:18,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275371351] [2023-11-23 14:43:18,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:43:18,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:18,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:18,223 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 14:43:18,252 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 14:43:18,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:43:18,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:18,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 14:43:18,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:18,335 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:43:18,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275371351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:43:18,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 14:43:18,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-23 14:43:18,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838308427] [2023-11-23 14:43:18,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:43:18,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 14:43:18,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:18,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 14:43:18,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-23 14:43:18,337 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:18,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:18,370 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2023-11-23 14:43:18,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 14:43:18,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-23 14:43:18,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:18,371 INFO L225 Difference]: With dead ends: 44 [2023-11-23 14:43:18,372 INFO L226 Difference]: Without dead ends: 25 [2023-11-23 14:43:18,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-23 14:43:18,377 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:18,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 18 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:43:18,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-23 14:43:18,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-23 14:43:18,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:18,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-23 14:43:18,386 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 21 [2023-11-23 14:43:18,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:18,386 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-23 14:43:18,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:18,387 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-23 14:43:18,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 14:43:18,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:18,387 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:18,401 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 14:43:18,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 14:43:18,600 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:18,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:18,600 INFO L85 PathProgramCache]: Analyzing trace with hash 158357212, now seen corresponding path program 1 times [2023-11-23 14:43:18,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:18,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305695197] [2023-11-23 14:43:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:18,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:18,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:18,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305695197] [2023-11-23 14:43:18,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305695197] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:18,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332064558] [2023-11-23 14:43:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:18,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:18,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:18,993 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 14:43:19,033 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 14:43:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:19,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-23 14:43:19,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:19,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 14:43:19,230 INFO L349 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-11-23 14:43:19,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2023-11-23 14:43:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:19,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:19,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2023-11-23 14:43:19,583 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 47 treesize of output 43 [2023-11-23 14:43:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 14:43:19,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332064558] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:19,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:19,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 31 [2023-11-23 14:43:19,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606095829] [2023-11-23 14:43:19,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:19,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-23 14:43:19,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:19,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-23 14:43:19,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2023-11-23 14:43:19,688 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:22,058 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 14:43:24,338 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 14:43:24,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:24,745 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2023-11-23 14:43:24,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-23 14:43:24,746 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-23 14:43:24,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:24,747 INFO L225 Difference]: With dead ends: 127 [2023-11-23 14:43:24,747 INFO L226 Difference]: Without dead ends: 108 [2023-11-23 14:43:24,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=958, Invalid=3734, Unknown=0, NotChecked=0, Total=4692 [2023-11-23 14:43:24,749 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 340 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:24,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 111 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 374 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2023-11-23 14:43:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-23 14:43:24,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 39. [2023-11-23 14:43:24,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 38 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 14:43:24,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-11-23 14:43:24,756 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 21 [2023-11-23 14:43:24,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:24,756 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-11-23 14:43:24,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:24,757 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-11-23 14:43:24,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-23 14:43:24,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:24,757 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:24,784 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 14:43:24,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:24,988 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:24,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:24,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1682082418, now seen corresponding path program 1 times [2023-11-23 14:43:24,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:24,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566293695] [2023-11-23 14:43:24,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:24,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:25,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:25,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566293695] [2023-11-23 14:43:25,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566293695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:25,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087556301] [2023-11-23 14:43:25,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:25,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:25,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:25,295 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 14:43:25,332 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 14:43:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:25,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-23 14:43:25,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:25,442 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 14:43:25,554 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:25,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:25,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-23 14:43:25,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-23 14:43:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:25,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087556301] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:25,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:25,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2023-11-23 14:43:25,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275007481] [2023-11-23 14:43:25,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:25,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-23 14:43:25,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:25,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-23 14:43:25,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2023-11-23 14:43:25,700 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:26,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:26,086 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2023-11-23 14:43:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-23 14:43:26,087 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-23 14:43:26,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:26,087 INFO L225 Difference]: With dead ends: 80 [2023-11-23 14:43:26,087 INFO L226 Difference]: Without dead ends: 78 [2023-11-23 14:43:26,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=350, Invalid=1906, Unknown=0, NotChecked=0, Total=2256 [2023-11-23 14:43:26,089 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 101 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:26,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 101 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:43:26,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-23 14:43:26,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2023-11-23 14:43:26,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 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 14:43:26,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2023-11-23 14:43:26,097 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 26 [2023-11-23 14:43:26,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:26,097 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2023-11-23 14:43:26,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:26,097 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2023-11-23 14:43:26,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 14:43:26,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:26,098 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:26,126 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 14:43:26,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:26,327 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:26,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:26,327 INFO L85 PathProgramCache]: Analyzing trace with hash -760105444, now seen corresponding path program 2 times [2023-11-23 14:43:26,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:26,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839938549] [2023-11-23 14:43:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:26,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 14:43:26,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:26,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839938549] [2023-11-23 14:43:26,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839938549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:26,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647667211] [2023-11-23 14:43:26,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:43:26,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:26,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:26,545 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 14:43:26,607 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 14:43:26,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:43:26,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:26,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 14:43:26,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:26,862 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 14:43:26,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 14:43:26,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647667211] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:26,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:26,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2023-11-23 14:43:26,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699829631] [2023-11-23 14:43:27,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:27,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 14:43:27,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:27,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 14:43:27,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2023-11-23 14:43:27,001 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:27,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:27,123 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2023-11-23 14:43:27,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 14:43:27,124 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-23 14:43:27,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:27,124 INFO L225 Difference]: With dead ends: 100 [2023-11-23 14:43:27,124 INFO L226 Difference]: Without dead ends: 79 [2023-11-23 14:43:27,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2023-11-23 14:43:27,125 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 157 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:27,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 82 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:43:27,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-23 14:43:27,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 51. [2023-11-23 14:43:27,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.22) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:27,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2023-11-23 14:43:27,133 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 31 [2023-11-23 14:43:27,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:27,133 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2023-11-23 14:43:27,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:27,133 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2023-11-23 14:43:27,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 14:43:27,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:27,134 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:27,145 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 14:43:27,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:27,346 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:27,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:27,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2091401988, now seen corresponding path program 3 times [2023-11-23 14:43:27,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:27,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147211649] [2023-11-23 14:43:27,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:27,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:27,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:27,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147211649] [2023-11-23 14:43:27,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147211649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:27,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635054574] [2023-11-23 14:43:27,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 14:43:27,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:27,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:27,749 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 14:43:27,772 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 14:43:27,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-23 14:43:27,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:27,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-23 14:43:27,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:27,828 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 14:43:27,875 INFO L349 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-11-23 14:43:27,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2023-11-23 14:43:27,934 INFO L349 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-11-23 14:43:27,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 27 [2023-11-23 14:43:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:28,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:34,682 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 39 treesize of output 37 [2023-11-23 14:43:34,694 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 318 treesize of output 310 [2023-11-23 14:43:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 34 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:43:34,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635054574] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:34,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:34,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 39 [2023-11-23 14:43:34,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006694221] [2023-11-23 14:43:34,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:34,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-23 14:43:34,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:34,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-23 14:43:34,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1221, Unknown=3, NotChecked=0, Total=1482 [2023-11-23 14:43:34,790 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 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 14:43:35,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:35,645 INFO L93 Difference]: Finished difference Result 196 states and 238 transitions. [2023-11-23 14:43:35,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-23 14:43:35,645 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 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 35 [2023-11-23 14:43:35,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:35,646 INFO L225 Difference]: With dead ends: 196 [2023-11-23 14:43:35,646 INFO L226 Difference]: Without dead ends: 155 [2023-11-23 14:43:35,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=820, Invalid=3599, Unknown=3, NotChecked=0, Total=4422 [2023-11-23 14:43:35,647 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 175 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:35,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 141 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 14:43:35,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-23 14:43:35,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 67. [2023-11-23 14:43:35,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 66 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 14:43:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2023-11-23 14:43:35,657 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 35 [2023-11-23 14:43:35,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:35,658 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2023-11-23 14:43:35,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 39 states have internal predecessors, (84), 0 states have call successors, (0), 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 14:43:35,658 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2023-11-23 14:43:35,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 14:43:35,659 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:35,659 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:35,672 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 14:43:35,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:35,870 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:35,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:35,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1898257818, now seen corresponding path program 4 times [2023-11-23 14:43:35,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:35,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342923707] [2023-11-23 14:43:35,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:35,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 14:43:36,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:36,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342923707] [2023-11-23 14:43:36,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342923707] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:36,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472887356] [2023-11-23 14:43:36,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 14:43:36,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:36,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:36,183 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 14:43:36,184 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 14:43:36,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 14:43:36,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:36,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-23 14:43:36,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:36,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 14:43:36,352 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-23 14:43:36,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-23 14:43:36,391 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-23 14:43:36,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-23 14:43:36,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-11-23 14:43:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 14:43:36,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:38,573 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_44| Int)) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_44| 1)) (forall ((v_ArrVal_121 Int)) (< (select (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) (* |v_ULTIMATE.start_main_~j~0#1_44| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_121) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) is different from false [2023-11-23 14:43:53,890 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_58| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_58| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|v_ULTIMATE.start_main_~j~0#1_45| Int)) (or (< 2 |v_ULTIMATE.start_main_~j~0#1_45|) (forall ((v_ArrVal_121 Int) (|v_ULTIMATE.start_main_~j~0#1_44| Int) (v_ArrVal_119 Int)) (or (< (select (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_58| 8))) (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_45| (- 4))) v_ArrVal_119) (+ .cse0 (* |v_ULTIMATE.start_main_~j~0#1_44| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_121)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) |c_ULTIMATE.start_main_~MINVAL~0#1|) (< |v_ULTIMATE.start_main_~j~0#1_45| (+ |v_ULTIMATE.start_main_~j~0#1_44| 1)))))))) is different from false [2023-11-23 14:43:53,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2023-11-23 14:43:53,938 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 1486 treesize of output 1454 [2023-11-23 14:43:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 11 not checked. [2023-11-23 14:43:54,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472887356] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:54,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:54,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 14] total 33 [2023-11-23 14:43:54,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496355212] [2023-11-23 14:43:54,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:54,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-23 14:43:54,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:54,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-23 14:43:54,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=8, NotChecked=118, Total=1056 [2023-11-23 14:43:54,054 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 33 states, 33 states have (on average 3.0) internal successors, (99), 33 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 14:43:54,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:54,774 INFO L93 Difference]: Finished difference Result 150 states and 181 transitions. [2023-11-23 14:43:54,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 14:43:54,775 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0) internal successors, (99), 33 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 40 [2023-11-23 14:43:54,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:54,775 INFO L225 Difference]: With dead ends: 150 [2023-11-23 14:43:54,775 INFO L226 Difference]: Without dead ends: 100 [2023-11-23 14:43:54,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=324, Invalid=2028, Unknown=8, NotChecked=190, Total=2550 [2023-11-23 14:43:54,777 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 128 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:54,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 195 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 569 Invalid, 0 Unknown, 129 Unchecked, 0.3s Time] [2023-11-23 14:43:54,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-23 14:43:54,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2023-11-23 14:43:54,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1875) internal successors, (95), 80 states have internal predecessors, (95), 0 states have call successors, (0), 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 14:43:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2023-11-23 14:43:54,788 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 40 [2023-11-23 14:43:54,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:54,788 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2023-11-23 14:43:54,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0) internal successors, (99), 33 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 14:43:54,788 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2023-11-23 14:43:54,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 14:43:54,789 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:54,789 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:54,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 14:43:55,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:55,001 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:55,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:55,001 INFO L85 PathProgramCache]: Analyzing trace with hash -915790974, now seen corresponding path program 5 times [2023-11-23 14:43:55,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:55,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662380864] [2023-11-23 14:43:55,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:55,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:55,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 14:43:55,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:55,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662380864] [2023-11-23 14:43:55,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662380864] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:55,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062220796] [2023-11-23 14:43:55,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 14:43:55,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:55,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:55,344 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 14:43:55,345 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 14:43:55,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-23 14:43:55,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:55,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-23 14:43:55,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:55,488 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 14:43:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 14:43:55,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:55,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-23 14:43:55,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-23 14:43:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 14:43:55,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062220796] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:55,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:55,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2023-11-23 14:43:55,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276392053] [2023-11-23 14:43:55,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:55,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-23 14:43:55,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:55,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-23 14:43:55,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2023-11-23 14:43:55,815 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 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 14:43:56,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:56,416 INFO L93 Difference]: Finished difference Result 143 states and 164 transitions. [2023-11-23 14:43:56,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-23 14:43:56,416 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 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 14:43:56,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:56,417 INFO L225 Difference]: With dead ends: 143 [2023-11-23 14:43:56,417 INFO L226 Difference]: Without dead ends: 141 [2023-11-23 14:43:56,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=2035, Unknown=0, NotChecked=0, Total=2352 [2023-11-23 14:43:56,418 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:56,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 256 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 14:43:56,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-23 14:43:56,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 99. [2023-11-23 14:43:56,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.1734693877551021) internal successors, (115), 98 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2023-11-23 14:43:56,435 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 45 [2023-11-23 14:43:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:56,435 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2023-11-23 14:43:56,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.375) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 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 14:43:56,435 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2023-11-23 14:43:56,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 14:43:56,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:56,439 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:56,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 14:43:56,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 14:43:56,644 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:56,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:56,644 INFO L85 PathProgramCache]: Analyzing trace with hash -433067843, now seen corresponding path program 6 times [2023-11-23 14:43:56,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:56,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111819527] [2023-11-23 14:43:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:56,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 61 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-23 14:43:56,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:56,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111819527] [2023-11-23 14:43:56,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111819527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:56,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500410555] [2023-11-23 14:43:56,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 14:43:56,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:56,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:56,698 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 14:43:56,723 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 14:43:56,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-23 14:43:56,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:56,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 14:43:56,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:56,780 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-23 14:43:56,781 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 14:43:56,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500410555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 14:43:56,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 14:43:56,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-11-23 14:43:56,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091353535] [2023-11-23 14:43:56,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 14:43:56,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 14:43:56,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:56,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 14:43:56,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 14:43:56,783 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 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 14:43:56,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:56,811 INFO L93 Difference]: Finished difference Result 181 states and 213 transitions. [2023-11-23 14:43:56,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 14:43:56,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 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) Word has length 47 [2023-11-23 14:43:56,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:56,813 INFO L225 Difference]: With dead ends: 181 [2023-11-23 14:43:56,813 INFO L226 Difference]: Without dead ends: 99 [2023-11-23 14:43:56,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 14:43:56,816 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:56,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 19 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 14:43:56,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-23 14:43:56,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2023-11-23 14:43:56,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 93 states have internal predecessors, (106), 0 states have call successors, (0), 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 14:43:56,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2023-11-23 14:43:56,831 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 47 [2023-11-23 14:43:56,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:56,831 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2023-11-23 14:43:56,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 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 14:43:56,831 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2023-11-23 14:43:56,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 14:43:56,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:56,832 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:56,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 14:43:57,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-23 14:43:57,044 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:57,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:57,045 INFO L85 PathProgramCache]: Analyzing trace with hash 659005608, now seen corresponding path program 7 times [2023-11-23 14:43:57,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:57,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323305015] [2023-11-23 14:43:57,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:57,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 14:43:57,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:57,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323305015] [2023-11-23 14:43:57,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323305015] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:57,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715617300] [2023-11-23 14:43:57,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 14:43:57,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:57,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:57,337 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 14:43:57,339 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 14:43:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:57,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 14:43:57,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 14:43:57,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:43:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 14:43:58,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715617300] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:43:58,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:43:58,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 34 [2023-11-23 14:43:58,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868016201] [2023-11-23 14:43:58,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:43:58,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-23 14:43:58,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:43:58,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-23 14:43:58,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2023-11-23 14:43:58,050 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 34 states, 34 states have (on average 3.764705882352941) internal successors, (128), 34 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:58,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:43:58,295 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2023-11-23 14:43:58,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 14:43:58,296 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.764705882352941) internal successors, (128), 34 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-23 14:43:58,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:43:58,296 INFO L225 Difference]: With dead ends: 151 [2023-11-23 14:43:58,296 INFO L226 Difference]: Without dead ends: 120 [2023-11-23 14:43:58,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=438, Invalid=1202, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 14:43:58,297 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 182 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:43:58,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 150 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:43:58,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-23 14:43:58,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2023-11-23 14:43:58,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.13) internal successors, (113), 100 states have internal predecessors, (113), 0 states have call successors, (0), 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 14:43:58,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2023-11-23 14:43:58,327 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 50 [2023-11-23 14:43:58,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:43:58,327 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2023-11-23 14:43:58,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.764705882352941) internal successors, (128), 34 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:43:58,327 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2023-11-23 14:43:58,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 14:43:58,328 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:43:58,328 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:43:58,339 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 14:43:58,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 14:43:58,540 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:43:58,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:43:58,540 INFO L85 PathProgramCache]: Analyzing trace with hash -475474364, now seen corresponding path program 8 times [2023-11-23 14:43:58,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:43:58,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789607211] [2023-11-23 14:43:58,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:43:58,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:43:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:43:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 6 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 14:43:59,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:43:59,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789607211] [2023-11-23 14:43:59,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789607211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:43:59,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815033582] [2023-11-23 14:43:59,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:43:59,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:43:59,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:43:59,475 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 14:43:59,504 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 14:43:59,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:43:59,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:43:59,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-23 14:43:59,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:43:59,600 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 14:43:59,670 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-23 14:43:59,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-23 14:43:59,709 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-23 14:43:59,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-23 14:43:59,768 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-23 14:43:59,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-23 14:43:59,807 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-23 14:43:59,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-23 14:43:59,866 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-23 14:43:59,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-23 14:43:59,915 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-23 14:43:59,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-23 14:44:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 42 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 14:44:00,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:44:02,175 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_69| Int)) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_69| 1)) (forall ((v_ArrVal_245 Int)) (= (select (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) (* |v_ULTIMATE.start_main_~j~0#1_69| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_245) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) 0)))) is different from false [2023-11-23 14:44:16,030 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~j~0#1_73| Int)) (or (forall ((v_ArrVal_239 Int) (|v_ULTIMATE.start_main_~j~0#1_72| Int)) (or (forall ((v_ArrVal_242 Int)) (= (select (let ((.cse0 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_73| (- 4))) v_ArrVal_239) (+ .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_72| (- 4))) v_ArrVal_242)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) 0)) (< |v_ULTIMATE.start_main_~j~0#1_73| (+ |v_ULTIMATE.start_main_~j~0#1_72| 1)))) (< 2 |v_ULTIMATE.start_main_~j~0#1_73|))) (<= 1 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2023-11-23 14:44:18,046 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_93| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_93| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|v_ULTIMATE.start_main_~j~0#1_73| Int)) (or (forall ((v_ArrVal_239 Int) (|v_ULTIMATE.start_main_~j~0#1_72| Int)) (or (< |v_ULTIMATE.start_main_~j~0#1_73| (+ |v_ULTIMATE.start_main_~j~0#1_72| 1)) (forall ((v_ArrVal_242 Int)) (= (select (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_93| 8))) (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0 (* |v_ULTIMATE.start_main_~j~0#1_73| (- 4))) v_ArrVal_239) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_72| (- 4)) .cse0) v_ArrVal_242)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) 0)))) (< 2 |v_ULTIMATE.start_main_~j~0#1_73|))))) (<= 0 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2023-11-23 14:44:20,103 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_93| Int) (v_ArrVal_237 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_93| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|v_ULTIMATE.start_main_~j~0#1_73| Int)) (or (forall ((v_ArrVal_239 Int) (|v_ULTIMATE.start_main_~j~0#1_72| Int)) (or (< |v_ULTIMATE.start_main_~j~0#1_73| (+ |v_ULTIMATE.start_main_~j~0#1_72| 1)) (forall ((v_ArrVal_242 Int)) (= (select (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_93| 8))) (store (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4))) v_ArrVal_237) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0 (* |v_ULTIMATE.start_main_~j~0#1_73| (- 4))) v_ArrVal_239) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_72| (- 4)) .cse0) v_ArrVal_242)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) 0)))) (< 2 |v_ULTIMATE.start_main_~j~0#1_73|))))) (<= 0 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2023-11-23 14:44:22,149 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~j~0#1_75| Int)) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_75| 1)) (forall ((|v_ULTIMATE.start_main_~i~0#1_93| Int) (v_ArrVal_237 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_93| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|v_ULTIMATE.start_main_~j~0#1_73| Int)) (or (forall ((v_ArrVal_239 Int) (|v_ULTIMATE.start_main_~j~0#1_72| Int)) (or (< |v_ULTIMATE.start_main_~j~0#1_73| (+ |v_ULTIMATE.start_main_~j~0#1_72| 1)) (forall ((v_ArrVal_242 Int)) (= (select (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_93| 8))) (store (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* |v_ULTIMATE.start_main_~j~0#1_75| (- 4)) (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_237) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0 (* |v_ULTIMATE.start_main_~j~0#1_73| (- 4))) v_ArrVal_239) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_72| (- 4)) .cse0) v_ArrVal_242)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) 0)))) (< 2 |v_ULTIMATE.start_main_~j~0#1_73|))))))) (<= 0 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2023-11-23 14:44:24,192 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_235 Int) (|v_ULTIMATE.start_main_~j~0#1_75| Int)) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_75| 1)) (forall ((|v_ULTIMATE.start_main_~i~0#1_93| Int) (v_ArrVal_237 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_93| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((|v_ULTIMATE.start_main_~j~0#1_73| Int)) (or (forall ((v_ArrVal_239 Int) (|v_ULTIMATE.start_main_~j~0#1_72| Int)) (or (< |v_ULTIMATE.start_main_~j~0#1_73| (+ |v_ULTIMATE.start_main_~j~0#1_72| 1)) (forall ((v_ArrVal_242 Int)) (= (select (let ((.cse1 (* |v_ULTIMATE.start_main_~i~0#1_93| 8))) (store (store (let ((.cse0 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4))) v_ArrVal_235) (+ (* |v_ULTIMATE.start_main_~j~0#1_75| (- 4)) .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_237)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1 (* |v_ULTIMATE.start_main_~j~0#1_73| (- 4))) v_ArrVal_239) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_72| (- 4)) .cse1) v_ArrVal_242)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) 0)))) (< 2 |v_ULTIMATE.start_main_~j~0#1_73|))))))) (<= 0 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2023-11-23 14:44:26,252 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~j~0#1_76| Int)) (or (< 2 |v_ULTIMATE.start_main_~j~0#1_76|) (forall ((v_ArrVal_235 Int) (|v_ULTIMATE.start_main_~j~0#1_75| Int)) (or (< |v_ULTIMATE.start_main_~j~0#1_76| (+ |v_ULTIMATE.start_main_~j~0#1_75| 1)) (forall ((|v_ULTIMATE.start_main_~i~0#1_93| Int) (v_ArrVal_237 Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_73| Int)) (or (< 2 |v_ULTIMATE.start_main_~j~0#1_73|) (forall ((v_ArrVal_239 Int) (|v_ULTIMATE.start_main_~j~0#1_72| Int)) (or (< |v_ULTIMATE.start_main_~j~0#1_73| (+ |v_ULTIMATE.start_main_~j~0#1_72| 1)) (forall ((v_ArrVal_242 Int)) (= (select (let ((.cse1 (* |v_ULTIMATE.start_main_~i~0#1_93| 8))) (store (store (let ((.cse0 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_76| (- 4))) v_ArrVal_235) (+ (* |v_ULTIMATE.start_main_~j~0#1_75| (- 4)) .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_237)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1 (* |v_ULTIMATE.start_main_~j~0#1_73| (- 4))) v_ArrVal_239) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_72| (- 4)) .cse1) v_ArrVal_242)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) 0)))))) (< |v_ULTIMATE.start_main_~i~0#1_93| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))))))) (<= 0 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2023-11-23 14:44:28,291 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (and (<= 0 .cse0) (forall ((|v_ULTIMATE.start_main_~i~0#1_94| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_94| .cse0) (forall ((|v_ULTIMATE.start_main_~j~0#1_76| Int)) (or (< 2 |v_ULTIMATE.start_main_~j~0#1_76|) (forall ((v_ArrVal_235 Int) (|v_ULTIMATE.start_main_~j~0#1_75| Int)) (or (< |v_ULTIMATE.start_main_~j~0#1_76| (+ |v_ULTIMATE.start_main_~j~0#1_75| 1)) (forall ((|v_ULTIMATE.start_main_~i~0#1_93| Int) (v_ArrVal_237 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_93| (+ |v_ULTIMATE.start_main_~i~0#1_94| 1)) (forall ((|v_ULTIMATE.start_main_~j~0#1_73| Int)) (or (forall ((v_ArrVal_239 Int) (|v_ULTIMATE.start_main_~j~0#1_72| Int)) (or (forall ((v_ArrVal_242 Int)) (= (select (let ((.cse2 (* |v_ULTIMATE.start_main_~i~0#1_93| 8))) (store (store (let ((.cse1 (* |v_ULTIMATE.start_main_~i~0#1_94| 8))) (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_76| (- 4))) v_ArrVal_235) (+ .cse1 (* |v_ULTIMATE.start_main_~j~0#1_75| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_237)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse2 (* |v_ULTIMATE.start_main_~j~0#1_73| (- 4))) v_ArrVal_239) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_72| (- 4)) .cse2) v_ArrVal_242)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) 0)) (< |v_ULTIMATE.start_main_~j~0#1_73| (+ |v_ULTIMATE.start_main_~j~0#1_72| 1)))) (< 2 |v_ULTIMATE.start_main_~j~0#1_73|))))))))))))) is different from false [2023-11-23 14:44:28,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 57 [2023-11-23 14:44:28,446 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 172014 treesize of output 170990 [2023-11-23 14:44:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 85 not checked. [2023-11-23 14:44:28,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815033582] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:44:28,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:44:28,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 27] total 62 [2023-11-23 14:44:28,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542138488] [2023-11-23 14:44:28,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:44:28,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-23 14:44:28,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:44:28,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-23 14:44:28,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=2506, Unknown=13, NotChecked=888, Total=3782 [2023-11-23 14:44:28,762 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 62 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 14:44:30,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:44:30,041 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2023-11-23 14:44:30,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-23 14:44:30,042 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 62 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 53 [2023-11-23 14:44:30,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:44:30,042 INFO L225 Difference]: With dead ends: 142 [2023-11-23 14:44:30,042 INFO L226 Difference]: Without dead ends: 140 [2023-11-23 14:44:30,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 75 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=805, Invalid=5220, Unknown=13, NotChecked=1272, Total=7310 [2023-11-23 14:44:30,044 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 136 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 2051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 672 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 14:44:30,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 233 Invalid, 2051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1311 Invalid, 0 Unknown, 672 Unchecked, 0.6s Time] [2023-11-23 14:44:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-23 14:44:30,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 82. [2023-11-23 14:44:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 81 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 14:44:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2023-11-23 14:44:30,059 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 53 [2023-11-23 14:44:30,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:44:30,060 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2023-11-23 14:44:30,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.338709677419355) internal successors, (145), 62 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 14:44:30,060 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2023-11-23 14:44:30,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 14:44:30,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:44:30,060 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:44:30,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 14:44:30,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 14:44:30,272 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:44:30,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:44:30,272 INFO L85 PathProgramCache]: Analyzing trace with hash 964888140, now seen corresponding path program 9 times [2023-11-23 14:44:30,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:44:30,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559053172] [2023-11-23 14:44:30,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:44:30,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:44:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:44:30,870 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 1 proven. 96 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 14:44:30,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:44:30,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559053172] [2023-11-23 14:44:30,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559053172] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:44:30,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449064487] [2023-11-23 14:44:30,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 14:44:30,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:44:30,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:44:30,872 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 14:44:30,873 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 14:44:30,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-23 14:44:30,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:44:30,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-23 14:44:30,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:44:31,103 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 14:44:31,179 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-23 14:44:31,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-23 14:44:31,221 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-23 14:44:31,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-23 14:44:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 4 proven. 93 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 14:44:31,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:44:33,546 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_83| Int)) (or (forall ((v_ArrVal_279 Int)) (= (select (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) (* |v_ULTIMATE.start_main_~j~0#1_83| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_279) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) 0)) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_83| 1)))) is different from false [2023-11-23 14:44:45,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-23 14:44:45,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-23 14:44:45,937 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 5 trivial. 5 not checked. [2023-11-23 14:44:45,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449064487] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:44:45,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:44:45,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 20] total 48 [2023-11-23 14:44:45,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869251700] [2023-11-23 14:44:45,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:44:45,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-23 14:44:45,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:44:45,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-23 14:44:45,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1952, Unknown=6, NotChecked=90, Total=2256 [2023-11-23 14:44:45,938 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 48 states, 48 states have (on average 2.9791666666666665) internal successors, (143), 48 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:47,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:44:47,049 INFO L93 Difference]: Finished difference Result 135 states and 150 transitions. [2023-11-23 14:44:47,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-23 14:44:47,050 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9791666666666665) internal successors, (143), 48 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-23 14:44:47,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:44:47,050 INFO L225 Difference]: With dead ends: 135 [2023-11-23 14:44:47,050 INFO L226 Difference]: Without dead ends: 77 [2023-11-23 14:44:47,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1819 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=669, Invalid=5181, Unknown=6, NotChecked=150, Total=6006 [2023-11-23 14:44:47,052 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 163 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 14:44:47,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 188 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 939 Invalid, 0 Unknown, 77 Unchecked, 0.4s Time] [2023-11-23 14:44:47,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-23 14:44:47,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2023-11-23 14:44:47,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:47,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2023-11-23 14:44:47,060 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 54 [2023-11-23 14:44:47,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:44:47,060 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2023-11-23 14:44:47,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9791666666666665) internal successors, (143), 48 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:47,060 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2023-11-23 14:44:47,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-23 14:44:47,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:44:47,061 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:44:47,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-23 14:44:47,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 14:44:47,273 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:44:47,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:44:47,273 INFO L85 PathProgramCache]: Analyzing trace with hash 102689822, now seen corresponding path program 10 times [2023-11-23 14:44:47,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:44:47,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98578798] [2023-11-23 14:44:47,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:44:47,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:44:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:44:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 8 proven. 103 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 14:44:47,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:44:47,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98578798] [2023-11-23 14:44:47,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98578798] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:44:47,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27595824] [2023-11-23 14:44:47,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 14:44:47,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:44:47,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:44:47,628 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 14:44:47,629 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 14:44:47,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 14:44:47,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:44:47,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-23 14:44:47,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:44:47,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 14:44:47,875 INFO L349 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2023-11-23 14:44:47,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 29 [2023-11-23 14:44:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 14:44:48,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:44:48,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2023-11-23 14:44:48,775 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 59 treesize of output 51 [2023-11-23 14:44:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 14:44:48,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27595824] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:44:48,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:44:48,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 19] total 44 [2023-11-23 14:44:48,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331491241] [2023-11-23 14:44:48,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:44:48,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-23 14:44:48,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:44:48,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-23 14:44:48,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1715, Unknown=0, NotChecked=0, Total=1892 [2023-11-23 14:44:48,872 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 44 states, 44 states have (on average 3.25) internal successors, (143), 44 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:52,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:44:52,486 INFO L93 Difference]: Finished difference Result 145 states and 157 transitions. [2023-11-23 14:44:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-23 14:44:52,488 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.25) internal successors, (143), 44 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-23 14:44:52,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:44:52,488 INFO L225 Difference]: With dead ends: 145 [2023-11-23 14:44:52,488 INFO L226 Difference]: Without dead ends: 136 [2023-11-23 14:44:52,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2618 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=869, Invalid=7687, Unknown=0, NotChecked=0, Total=8556 [2023-11-23 14:44:52,490 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 299 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 38 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-23 14:44:52,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 371 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1411 Invalid, 3 Unknown, 0 Unchecked, 2.3s Time] [2023-11-23 14:44:52,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-23 14:44:52,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 97. [2023-11-23 14:44:52,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.09375) internal successors, (105), 96 states have internal predecessors, (105), 0 states have call successors, (0), 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 14:44:52,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 105 transitions. [2023-11-23 14:44:52,506 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 105 transitions. Word has length 59 [2023-11-23 14:44:52,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:44:52,506 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 105 transitions. [2023-11-23 14:44:52,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.25) internal successors, (143), 44 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:44:52,506 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 105 transitions. [2023-11-23 14:44:52,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-23 14:44:52,507 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:44:52,507 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:44:52,518 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 14:44:52,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-23 14:44:52,718 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:44:52,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:44:52,718 INFO L85 PathProgramCache]: Analyzing trace with hash 243521932, now seen corresponding path program 11 times [2023-11-23 14:44:52,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:44:52,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340487187] [2023-11-23 14:44:52,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:44:52,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:44:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:44:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 41 proven. 89 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 14:44:53,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:44:53,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340487187] [2023-11-23 14:44:53,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340487187] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:44:53,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596068674] [2023-11-23 14:44:53,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 14:44:53,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:44:53,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:44:53,296 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 14:44:53,297 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 14:44:53,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-23 14:44:53,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:44:53,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-23 14:44:53,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:44:53,543 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 14:44:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 14:44:53,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:44:54,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-23 14:44:54,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-23 14:44:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 14:44:54,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596068674] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:44:54,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:44:54,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 17] total 49 [2023-11-23 14:44:54,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289811431] [2023-11-23 14:44:54,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:44:54,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-23 14:44:54,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:44:54,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-23 14:44:54,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=2124, Unknown=0, NotChecked=0, Total=2352 [2023-11-23 14:44:54,165 INFO L87 Difference]: Start difference. First operand 97 states and 105 transitions. Second operand has 49 states, 49 states have (on average 3.5306122448979593) internal successors, (173), 49 states have internal predecessors, (173), 0 states have call successors, (0), 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 14:44:55,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:44:55,793 INFO L93 Difference]: Finished difference Result 145 states and 158 transitions. [2023-11-23 14:44:55,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-23 14:44:55,793 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.5306122448979593) internal successors, (173), 49 states have internal predecessors, (173), 0 states have call successors, (0), 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 64 [2023-11-23 14:44:55,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:44:55,797 INFO L225 Difference]: With dead ends: 145 [2023-11-23 14:44:55,797 INFO L226 Difference]: Without dead ends: 126 [2023-11-23 14:44:55,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1003, Invalid=8503, Unknown=0, NotChecked=0, Total=9506 [2023-11-23 14:44:55,800 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 198 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 14:44:55,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 287 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 14:44:55,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-23 14:44:55,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 102. [2023-11-23 14:44:55,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0693069306930694) internal successors, (108), 101 states have internal predecessors, (108), 0 states have call successors, (0), 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 14:44:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2023-11-23 14:44:55,824 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 64 [2023-11-23 14:44:55,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:44:55,824 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2023-11-23 14:44:55,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.5306122448979593) internal successors, (173), 49 states have internal predecessors, (173), 0 states have call successors, (0), 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 14:44:55,825 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2023-11-23 14:44:55,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 14:44:55,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:44:55,825 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:44:55,844 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 14:44:56,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:44:56,041 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:44:56,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:44:56,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1866612126, now seen corresponding path program 12 times [2023-11-23 14:44:56,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:44:56,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486140843] [2023-11-23 14:44:56,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:44:56,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:44:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:44:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 73 proven. 86 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 14:44:56,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:44:56,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486140843] [2023-11-23 14:44:56,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486140843] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:44:56,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185375315] [2023-11-23 14:44:56,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 14:44:56,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:44:56,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:44:56,433 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 14:44:56,434 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 14:44:56,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-23 14:44:56,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:44:56,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 14:44:56,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:44:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 99 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 14:44:56,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:44:57,275 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 99 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 14:44:57,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185375315] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:44:57,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:44:57,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 42 [2023-11-23 14:44:57,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663488013] [2023-11-23 14:44:57,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:44:57,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-23 14:44:57,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:44:57,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-23 14:44:57,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1310, Unknown=0, NotChecked=0, Total=1722 [2023-11-23 14:44:57,276 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 42 states, 42 states have (on average 4.238095238095238) internal successors, (178), 42 states have internal predecessors, (178), 0 states have call successors, (0), 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 14:44:57,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:44:57,527 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2023-11-23 14:44:57,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 14:44:57,528 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.238095238095238) internal successors, (178), 42 states have internal predecessors, (178), 0 states have call successors, (0), 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 14:44:57,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:44:57,528 INFO L225 Difference]: With dead ends: 123 [2023-11-23 14:44:57,528 INFO L226 Difference]: Without dead ends: 82 [2023-11-23 14:44:57,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=618, Invalid=1832, Unknown=0, NotChecked=0, Total=2450 [2023-11-23 14:44:57,530 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 185 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:44:57,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 183 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:44:57,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-23 14:44:57,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2023-11-23 14:44:57,542 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 14:44:57,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2023-11-23 14:44:57,542 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 69 [2023-11-23 14:44:57,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:44:57,543 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2023-11-23 14:44:57,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.238095238095238) internal successors, (178), 42 states have internal predecessors, (178), 0 states have call successors, (0), 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 14:44:57,543 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2023-11-23 14:44:57,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-11-23 14:44:57,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:44:57,545 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:44:57,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 14:44:57,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:44:57,756 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:44:57,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:44:57,757 INFO L85 PathProgramCache]: Analyzing trace with hash 538603968, now seen corresponding path program 13 times [2023-11-23 14:44:57,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:44:57,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602480108] [2023-11-23 14:44:57,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:44:57,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:44:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:44:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 1 proven. 196 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 14:44:58,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:44:58,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602480108] [2023-11-23 14:44:58,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602480108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:44:58,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623409389] [2023-11-23 14:44:58,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 14:44:58,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:44:58,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:44:58,326 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 14:44:58,328 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 14:44:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:44:58,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-23 14:44:58,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:44:58,481 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 18 treesize of output 14 [2023-11-23 14:44:58,623 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-23 14:44:58,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-23 14:44:58,642 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-23 14:44:58,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2023-11-23 14:45:02,247 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-11-23 14:45:02,247 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 45 treesize of output 20 [2023-11-23 14:45:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 14:45:02,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:45:02,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-23 14:45:02,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-23 14:45:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 14:45:02,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623409389] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:45:02,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:45:02,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 21] total 37 [2023-11-23 14:45:02,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297830702] [2023-11-23 14:45:02,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:45:02,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-23 14:45:02,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:45:02,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-23 14:45:02,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1166, Unknown=7, NotChecked=0, Total=1332 [2023-11-23 14:45:02,558 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 37 states, 37 states have (on average 3.4864864864864864) internal successors, (129), 37 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 14:45:08,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:45:08,107 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2023-11-23 14:45:08,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-23 14:45:08,108 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.4864864864864864) internal successors, (129), 37 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 73 [2023-11-23 14:45:08,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:45:08,108 INFO L225 Difference]: With dead ends: 111 [2023-11-23 14:45:08,108 INFO L226 Difference]: Without dead ends: 109 [2023-11-23 14:45:08,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 129 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=416, Invalid=2992, Unknown=14, NotChecked=0, Total=3422 [2023-11-23 14:45:08,110 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 119 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 41 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:45:08,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 316 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1150 Invalid, 3 Unknown, 0 Unchecked, 2.1s Time] [2023-11-23 14:45:08,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-23 14:45:08,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 79. [2023-11-23 14:45:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0769230769230769) internal successors, (84), 78 states have internal predecessors, (84), 0 states have call successors, (0), 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 14:45:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2023-11-23 14:45:08,125 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 73 [2023-11-23 14:45:08,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:45:08,125 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2023-11-23 14:45:08,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.4864864864864864) internal successors, (129), 37 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 14:45:08,125 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2023-11-23 14:45:08,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-11-23 14:45:08,126 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:45:08,126 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:45:08,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-23 14:45:08,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:45:08,327 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:45:08,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:45:08,327 INFO L85 PathProgramCache]: Analyzing trace with hash 40143146, now seen corresponding path program 14 times [2023-11-23 14:45:08,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:45:08,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965219764] [2023-11-23 14:45:08,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:45:08,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:45:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:45:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 12 proven. 210 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 14:45:08,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:45:08,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965219764] [2023-11-23 14:45:08,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965219764] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:45:08,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239577807] [2023-11-23 14:45:08,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 14:45:08,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:45:08,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:45:08,795 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 14:45:08,797 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 14:45:08,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 14:45:08,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:45:08,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-23 14:45:08,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:45:09,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 14:45:09,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 14:45:09,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 11 [2023-11-23 14:45:09,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 14:45:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 12 proven. 210 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 14:45:09,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:45:11,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2023-11-23 14:45:11,789 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 174 treesize of output 166 [2023-11-23 14:45:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 12 proven. 210 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 14:45:11,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239577807] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:45:11,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:45:11,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 51 [2023-11-23 14:45:11,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720095853] [2023-11-23 14:45:11,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:45:11,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-23 14:45:11,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:45:11,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-23 14:45:11,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2299, Unknown=1, NotChecked=0, Total=2550 [2023-11-23 14:45:11,962 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 51 states, 51 states have (on average 4.03921568627451) internal successors, (206), 51 states have internal predecessors, (206), 0 states have call successors, (0), 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 14:45:15,222 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 24)) (.cse0 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (= 2 (select .cse0 .cse1)) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (not (= (* 2 |c_ULTIMATE.start_main_~i~0#1|) (+ |c_ULTIMATE.start_main_~j~0#1| 6))) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 2) (forall ((|v_ULTIMATE.start_main_~j~0#1_135| Int)) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_135| 1)) (forall ((v_ArrVal_452 Int)) (< |c_ULTIMATE.start_main_~MINVAL~0#1| (+ (select (store .cse0 (+ (* |v_ULTIMATE.start_main_~j~0#1_135| (- 4)) (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_452) .cse1) 1))))) (<= 2 (select .cse0 24)))) is different from false [2023-11-23 14:45:15,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:45:15,647 INFO L93 Difference]: Finished difference Result 181 states and 195 transitions. [2023-11-23 14:45:15,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-23 14:45:15,647 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.03921568627451) internal successors, (206), 51 states have internal predecessors, (206), 0 states have call successors, (0), 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 14:45:15,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:45:15,648 INFO L225 Difference]: With dead ends: 181 [2023-11-23 14:45:15,648 INFO L226 Difference]: Without dead ends: 172 [2023-11-23 14:45:15,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=602, Invalid=4950, Unknown=2, NotChecked=146, Total=5700 [2023-11-23 14:45:15,649 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 170 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 1893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 14:45:15,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 701 Invalid, 1893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1736 Invalid, 0 Unknown, 97 Unchecked, 1.0s Time] [2023-11-23 14:45:15,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-23 14:45:15,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 139. [2023-11-23 14:45:15,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0869565217391304) internal successors, (150), 138 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 14:45:15,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2023-11-23 14:45:15,677 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 78 [2023-11-23 14:45:15,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:45:15,677 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2023-11-23 14:45:15,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.03921568627451) internal successors, (206), 51 states have internal predecessors, (206), 0 states have call successors, (0), 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 14:45:15,678 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2023-11-23 14:45:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-23 14:45:15,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:45:15,678 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:45:15,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-23 14:45:15,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:45:15,890 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:45:15,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:45:15,890 INFO L85 PathProgramCache]: Analyzing trace with hash -223181824, now seen corresponding path program 15 times [2023-11-23 14:45:15,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:45:15,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720970622] [2023-11-23 14:45:15,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:45:15,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:45:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:45:16,319 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 14:45:16,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:45:16,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720970622] [2023-11-23 14:45:16,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720970622] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:45:16,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572512975] [2023-11-23 14:45:16,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 14:45:16,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:45:16,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:45:16,321 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 14:45:16,343 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 14:45:16,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-23 14:45:16,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:45:16,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-23 14:45:16,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:45:16,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-23 14:45:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 14:45:16,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:45:16,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-23 14:45:16,896 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 24 treesize of output 20 [2023-11-23 14:45:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 14:45:16,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572512975] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:45:16,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:45:16,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 32 [2023-11-23 14:45:16,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407627365] [2023-11-23 14:45:16,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:45:16,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-23 14:45:16,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:45:16,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-23 14:45:16,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2023-11-23 14:45:16,946 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand has 32 states, 32 states have (on average 4.0) internal successors, (128), 32 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:45:17,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:45:17,823 INFO L93 Difference]: Finished difference Result 221 states and 237 transitions. [2023-11-23 14:45:17,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-23 14:45:17,824 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.0) internal successors, (128), 32 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2023-11-23 14:45:17,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:45:17,824 INFO L225 Difference]: With dead ends: 221 [2023-11-23 14:45:17,824 INFO L226 Difference]: Without dead ends: 219 [2023-11-23 14:45:17,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=294, Invalid=2676, Unknown=0, NotChecked=0, Total=2970 [2023-11-23 14:45:17,826 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 46 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 14:45:17,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 507 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1370 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 14:45:17,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-11-23 14:45:17,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 172. [2023-11-23 14:45:17,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.087719298245614) internal successors, (186), 171 states have internal predecessors, (186), 0 states have call successors, (0), 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 14:45:17,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2023-11-23 14:45:17,854 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 83 [2023-11-23 14:45:17,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:45:17,854 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2023-11-23 14:45:17,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.0) internal successors, (128), 32 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:45:17,855 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2023-11-23 14:45:17,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-23 14:45:17,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:45:17,855 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 6, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:45:17,863 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 14:45:18,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:45:18,061 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:45:18,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:45:18,063 INFO L85 PathProgramCache]: Analyzing trace with hash 859692778, now seen corresponding path program 16 times [2023-11-23 14:45:18,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:45:18,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935301968] [2023-11-23 14:45:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:45:18,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:45:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:45:18,543 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 136 proven. 154 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 14:45:18,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:45:18,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935301968] [2023-11-23 14:45:18,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935301968] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:45:18,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481299863] [2023-11-23 14:45:18,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 14:45:18,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:45:18,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:45:18,544 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 14:45:18,574 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 14:45:18,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 14:45:18,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:45:18,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 14:45:18,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:45:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 172 proven. 118 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 14:45:19,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:45:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 172 proven. 118 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 14:45:19,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481299863] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:45:19,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:45:19,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 51 [2023-11-23 14:45:19,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126463891] [2023-11-23 14:45:19,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:45:19,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-23 14:45:19,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:45:19,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-23 14:45:19,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=542, Invalid=2008, Unknown=0, NotChecked=0, Total=2550 [2023-11-23 14:45:19,681 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand has 51 states, 51 states have (on average 4.490196078431373) internal successors, (229), 51 states have internal predecessors, (229), 0 states have call successors, (0), 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 14:45:20,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:45:20,104 INFO L93 Difference]: Finished difference Result 190 states and 206 transitions. [2023-11-23 14:45:20,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-23 14:45:20,104 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.490196078431373) internal successors, (229), 51 states have internal predecessors, (229), 0 states have call successors, (0), 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 88 [2023-11-23 14:45:20,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:45:20,105 INFO L225 Difference]: With dead ends: 190 [2023-11-23 14:45:20,105 INFO L226 Difference]: Without dead ends: 139 [2023-11-23 14:45:20,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1046, Invalid=3646, Unknown=0, NotChecked=0, Total=4692 [2023-11-23 14:45:20,106 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 390 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 14:45:20,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 261 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 14:45:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-23 14:45:20,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2023-11-23 14:45:20,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0797101449275361) internal successors, (149), 138 states have internal predecessors, (149), 0 states have call successors, (0), 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 14:45:20,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 149 transitions. [2023-11-23 14:45:20,137 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 149 transitions. Word has length 88 [2023-11-23 14:45:20,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:45:20,137 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 149 transitions. [2023-11-23 14:45:20,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.490196078431373) internal successors, (229), 51 states have internal predecessors, (229), 0 states have call successors, (0), 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 14:45:20,137 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 149 transitions. [2023-11-23 14:45:20,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-23 14:45:20,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:45:20,138 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 8, 7, 7, 5, 5, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:45:20,152 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 14:45:20,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:45:20,350 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:45:20,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:45:20,351 INFO L85 PathProgramCache]: Analyzing trace with hash 97845066, now seen corresponding path program 17 times [2023-11-23 14:45:20,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:45:20,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587847329] [2023-11-23 14:45:20,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:45:20,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:45:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:45:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 77 proven. 257 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-23 14:45:21,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:45:21,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587847329] [2023-11-23 14:45:21,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587847329] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:45:21,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199145919] [2023-11-23 14:45:21,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 14:45:21,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:45:21,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:45:21,081 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 14:45:21,104 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 14:45:21,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-11-23 14:45:21,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:45:21,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-23 14:45:21,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:45:21,463 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 14:45:21,568 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-23 14:45:21,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-23 14:45:21,614 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-23 14:45:21,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2023-11-23 14:45:25,804 INFO L349 Elim1Store]: treesize reduction 87, result has 29.3 percent of original size [2023-11-23 14:45:25,804 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 3 case distinctions, treesize of input 53 treesize of output 42 [2023-11-23 14:45:25,887 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-23 14:45:25,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-23 14:45:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 74 proven. 264 refuted. 1 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 14:45:26,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:45:47,593 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_270| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_178| Int)) (or (< 2 |v_ULTIMATE.start_main_~j~0#1_178|) (forall ((|v_ULTIMATE.start_main_~j~0#1_177| Int) (v_ArrVal_580 Int) (v_ArrVal_579 Int)) (or (< (select (let ((.cse0 (* 8 |v_ULTIMATE.start_main_~i~0#1_270|))) (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_178| (- 4))) v_ArrVal_579) (+ .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_177| (- 4))) v_ArrVal_580)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) |c_ULTIMATE.start_main_~MINVAL~0#1|) (< |v_ULTIMATE.start_main_~j~0#1_178| (+ |v_ULTIMATE.start_main_~j~0#1_177| 1)))))) (< |v_ULTIMATE.start_main_~i~0#1_270| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2023-11-23 14:46:14,779 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_271| Int)) (or (forall ((|v_ULTIMATE.start_main_~j~0#1_181| Int)) (or (< 2 |v_ULTIMATE.start_main_~j~0#1_181|) (forall ((|v_ULTIMATE.start_main_~j~0#1_177| Int) (v_ArrVal_574 Int) (|v_ULTIMATE.start_main_~j~0#1_178| Int) (v_ArrVal_580 Int) (|v_ULTIMATE.start_main_~i~0#1_270| Int) (|v_ULTIMATE.start_main_~j~0#1_180| Int) (v_ArrVal_579 Int)) (or (< |v_ULTIMATE.start_main_~j~0#1_181| (+ |v_ULTIMATE.start_main_~j~0#1_180| 1)) (< 2 |v_ULTIMATE.start_main_~j~0#1_178|) (< |v_ULTIMATE.start_main_~i~0#1_270| (+ |v_ULTIMATE.start_main_~i~0#1_271| 1)) (< |v_ULTIMATE.start_main_~j~0#1_178| (+ |v_ULTIMATE.start_main_~j~0#1_177| 1)) (< (select (let ((.cse1 (* 8 |v_ULTIMATE.start_main_~i~0#1_270|))) (store (store (let ((.cse0 (* 8 |v_ULTIMATE.start_main_~i~0#1_271|))) (store (store (select |c_#memory_int#2| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ .cse0 (* |v_ULTIMATE.start_main_~j~0#1_181| (- 4)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_574) (+ .cse0 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_180| (- 4))) 0)) (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_178| (- 4))) v_ArrVal_579) (+ .cse1 |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_177| (- 4))) v_ArrVal_580)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) |c_ULTIMATE.start_main_~MINVAL~0#1|))))) (< |v_ULTIMATE.start_main_~i~0#1_271| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2023-11-23 14:46:14,837 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 59 treesize of output 57 [2023-11-23 14:46:14,845 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 43246 treesize of output 42990 [2023-11-23 14:46:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 64 proven. 222 refuted. 2 times theorem prover too weak. 14 trivial. 51 not checked. [2023-11-23 14:46:15,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199145919] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:46:15,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:46:15,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 28] total 71 [2023-11-23 14:46:15,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227495129] [2023-11-23 14:46:15,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:46:15,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-23 14:46:15,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:46:15,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-23 14:46:15,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=4250, Unknown=23, NotChecked=270, Total=4970 [2023-11-23 14:46:15,336 INFO L87 Difference]: Start difference. First operand 139 states and 149 transitions. Second operand has 71 states, 71 states have (on average 3.1267605633802815) internal successors, (222), 71 states have internal predecessors, (222), 0 states have call successors, (0), 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 14:46:18,086 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, 1] [2023-11-23 14:46:20,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:46:24,410 WARN L539 Checker$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 14:46:28,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:46:30,582 WARN L539 Checker$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 14:46:32,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:46:40,681 WARN L539 Checker$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 14:46:42,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:46:44,701 WARN L539 Checker$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 14:46:46,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:46:48,716 WARN L539 Checker$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 14:46:54,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:46:56,809 WARN L539 Checker$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 14:47:00,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:47:02,957 WARN L539 Checker$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 14:47:04,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:47:12,421 WARN L539 Checker$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 14:47:14,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:47:16,446 WARN L539 Checker$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 14:47:18,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:47:20,475 WARN L539 Checker$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 14:47:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 14:47:20,843 INFO L93 Difference]: Finished difference Result 156 states and 167 transitions. [2023-11-23 14:47:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-23 14:47:20,844 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.1267605633802815) internal successors, (222), 71 states have internal predecessors, (222), 0 states have call successors, (0), 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 92 [2023-11-23 14:47:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 14:47:20,844 INFO L225 Difference]: With dead ends: 156 [2023-11-23 14:47:20,845 INFO L226 Difference]: Without dead ends: 142 [2023-11-23 14:47:20,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3468 ImplicationChecksByTransitivity, 76.3s TimeCoverageRelationStatistics Valid=980, Invalid=8114, Unknown=34, NotChecked=378, Total=9506 [2023-11-23 14:47:20,865 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 183 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 1790 mSolverCounterSat, 91 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 2085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1790 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 42.4s IncrementalHoareTripleChecker+Time [2023-11-23 14:47:20,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 666 Invalid, 2085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1790 Invalid, 21 Unknown, 183 Unchecked, 42.4s Time] [2023-11-23 14:47:20,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-23 14:47:20,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2023-11-23 14:47:20,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.065217391304348) internal successors, (147), 138 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 14:47:20,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 147 transitions. [2023-11-23 14:47:20,906 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 147 transitions. Word has length 92 [2023-11-23 14:47:20,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 14:47:20,906 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 147 transitions. [2023-11-23 14:47:20,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.1267605633802815) internal successors, (222), 71 states have internal predecessors, (222), 0 states have call successors, (0), 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 14:47:20,907 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 147 transitions. [2023-11-23 14:47:20,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-11-23 14:47:20,916 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 14:47:20,916 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 8, 7, 7, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 14:47:20,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-23 14:47:21,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-23 14:47:21,125 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 14:47:21,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 14:47:21,125 INFO L85 PathProgramCache]: Analyzing trace with hash -913272184, now seen corresponding path program 18 times [2023-11-23 14:47:21,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 14:47:21,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874580255] [2023-11-23 14:47:21,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 14:47:21,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 14:47:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 14:47:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 1 proven. 336 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 14:47:21,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 14:47:21,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874580255] [2023-11-23 14:47:21,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874580255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 14:47:21,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563213887] [2023-11-23 14:47:21,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-23 14:47:21,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 14:47:21,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 14:47:21,720 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 14:47:21,721 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 14:47:21,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-11-23 14:47:21,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 14:47:21,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-23 14:47:21,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 14:47:21,989 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 18 treesize of output 14 [2023-11-23 14:47:22,108 INFO L349 Elim1Store]: treesize reduction 38, result has 19.1 percent of original size [2023-11-23 14:47:22,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 13 [2023-11-23 14:47:22,155 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-23 14:47:22,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2023-11-23 14:47:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 2 proven. 336 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 14:47:22,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 14:47:23,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-11-23 14:47:23,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-23 14:47:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 1 proven. 336 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-23 14:47:23,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563213887] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 14:47:23,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 14:47:23,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 44 [2023-11-23 14:47:23,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627247082] [2023-11-23 14:47:23,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 14:47:23,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-23 14:47:23,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 14:47:23,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-23 14:47:23,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2023-11-23 14:47:23,212 INFO L87 Difference]: Start difference. First operand 139 states and 147 transitions. Second operand has 44 states, 44 states have (on average 3.5681818181818183) internal successors, (157), 44 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 14:47:29,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 14:47:33,795 WARN L539 Checker$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 14:47:36,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] Killed by 15