/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-cav19/array_tiling_tcpy.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 09:50:50,347 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 09:50:50,394 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 09:50:50,401 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 09:50:50,401 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 09:50:50,422 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 09:50:50,423 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 09:50:50,423 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 09:50:50,424 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 09:50:50,424 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 09:50:50,424 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 09:50:50,425 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 09:50:50,426 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 09:50:50,427 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 09:50:50,427 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 09:50:50,427 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 09:50:50,427 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 09:50:50,428 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 09:50:50,428 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 09:50:50,428 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 09:50:50,429 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 09:50:50,431 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 09:50:50,431 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 09:50:50,431 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 09:50:50,431 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 09:50:50,432 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 09:50:50,432 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 09:50:50,432 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 09:50:50,432 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 09:50:50,433 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 09:50:50,433 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 09:50:50,433 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 09:50:50,433 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 09:50:50,433 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 09:50:50,434 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 09:50:50,434 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 09:50:50,434 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 09:50:50,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 09:50:50,435 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 09:50:50,435 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 09:50:50,435 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 09:50:50,435 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 09:50:50,436 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 09:50:50,436 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 09:50:50,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 09:50:50,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 09:50:50,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 09:50:50,661 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 09:50:50,662 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 09:50:50,663 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_tiling_tcpy.c [2023-12-20 09:50:52,059 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 09:50:52,255 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 09:50:52,256 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_tiling_tcpy.c [2023-12-20 09:50:52,262 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd41d191a/98cc7eb73fb94a68baada43b7d65edfb/FLAG9168f6b2d [2023-12-20 09:50:52,278 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd41d191a/98cc7eb73fb94a68baada43b7d65edfb [2023-12-20 09:50:52,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 09:50:52,283 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 09:50:52,288 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 09:50:52,288 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 09:50:52,292 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 09:50:52,292 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 09:50:52" (1/1) ... [2023-12-20 09:50:52,293 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74119a90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:50:52, skipping insertion in model container [2023-12-20 09:50:52,293 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 09:50:52" (1/1) ... [2023-12-20 09:50:52,319 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 09:50:52,447 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_tiling_tcpy.c[408,421] [2023-12-20 09:50:52,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 09:50:52,464 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 09:50:52,474 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_tiling_tcpy.c[408,421] [2023-12-20 09:50:52,479 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 09:50:52,491 INFO L206 MainTranslator]: Completed translation [2023-12-20 09:50:52,491 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:50:52 WrapperNode [2023-12-20 09:50:52,491 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 09:50:52,492 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 09:50:52,492 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 09:50:52,492 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 09:50:52,498 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:50:52" (1/1) ... [2023-12-20 09:50:52,503 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:50:52" (1/1) ... [2023-12-20 09:50:52,516 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2023-12-20 09:50:52,517 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 09:50:52,517 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 09:50:52,518 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 09:50:52,518 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 09:50:52,529 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:50:52" (1/1) ... [2023-12-20 09:50:52,529 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:50:52" (1/1) ... [2023-12-20 09:50:52,531 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:50:52" (1/1) ... [2023-12-20 09:50:52,545 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 3, 3]. 38 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 0, 2]. [2023-12-20 09:50:52,545 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:50:52" (1/1) ... [2023-12-20 09:50:52,545 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:50:52" (1/1) ... [2023-12-20 09:50:52,550 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:50:52" (1/1) ... [2023-12-20 09:50:52,554 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:50:52" (1/1) ... [2023-12-20 09:50:52,555 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:50:52" (1/1) ... [2023-12-20 09:50:52,555 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:50:52" (1/1) ... [2023-12-20 09:50:52,557 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 09:50:52,558 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 09:50:52,558 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 09:50:52,558 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 09:50:52,558 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:50:52" (1/1) ... [2023-12-20 09:50:52,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 09:50:52,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:50:52,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-20 09:50:52,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-20 09:50:52,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 09:50:52,631 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-20 09:50:52,631 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-20 09:50:52,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 09:50:52,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 09:50:52,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-20 09:50:52,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 09:50:52,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 09:50:52,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 09:50:52,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-20 09:50:52,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 09:50:52,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 09:50:52,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 09:50:52,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 09:50:52,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-20 09:50:52,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 09:50:52,721 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 09:50:52,727 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 09:50:52,869 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 09:50:52,893 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 09:50:52,893 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-20 09:50:52,894 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 09:50:52 BoogieIcfgContainer [2023-12-20 09:50:52,894 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 09:50:52,896 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 09:50:52,896 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 09:50:52,899 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 09:50:52,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 09:50:52" (1/3) ... [2023-12-20 09:50:52,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284ecd29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 09:50:52, skipping insertion in model container [2023-12-20 09:50:52,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 09:50:52" (2/3) ... [2023-12-20 09:50:52,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@284ecd29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 09:50:52, skipping insertion in model container [2023-12-20 09:50:52,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 09:50:52" (3/3) ... [2023-12-20 09:50:52,901 INFO L112 eAbstractionObserver]: Analyzing ICFG array_tiling_tcpy.c [2023-12-20 09:50:52,915 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 09:50:52,916 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 09:50:52,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 09:50:52,966 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;@5897ec18, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 09:50:52,966 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 09:50:52,969 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:50:52,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-20 09:50:52,975 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:50:52,976 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:50:52,976 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:50:52,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:50:52,980 INFO L85 PathProgramCache]: Analyzing trace with hash 465532944, now seen corresponding path program 1 times [2023-12-20 09:50:52,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:50:52,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953717981] [2023-12-20 09:50:52,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:50:52,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:50:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:53,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:50:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:53,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:50:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:50:53,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:50:53,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953717981] [2023-12-20 09:50:53,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953717981] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 09:50:53,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 09:50:53,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 09:50:53,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070197006] [2023-12-20 09:50:53,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 09:50:53,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 09:50:53,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:50:53,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 09:50:53,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 09:50:53,187 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:50:53,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:50:53,231 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2023-12-20 09:50:53,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 09:50:53,233 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-12-20 09:50:53,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:50:53,238 INFO L225 Difference]: With dead ends: 32 [2023-12-20 09:50:53,238 INFO L226 Difference]: Without dead ends: 15 [2023-12-20 09:50:53,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 09:50:53,246 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 09:50:53,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 09:50:53,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-20 09:50:53,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-12-20 09:50:53,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:50:53,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-12-20 09:50:53,275 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 17 [2023-12-20 09:50:53,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:50:53,275 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-12-20 09:50:53,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:50:53,276 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-12-20 09:50:53,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-20 09:50:53,276 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:50:53,277 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:50:53,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 09:50:53,277 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:50:53,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:50:53,278 INFO L85 PathProgramCache]: Analyzing trace with hash 134474064, now seen corresponding path program 1 times [2023-12-20 09:50:53,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:50:53,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074616864] [2023-12-20 09:50:53,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:50:53,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:50:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:53,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:50:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:53,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:50:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:53,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:50:53,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:50:53,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074616864] [2023-12-20 09:50:53,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074616864] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 09:50:53,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 09:50:53,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 09:50:53,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007423327] [2023-12-20 09:50:53,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 09:50:53,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 09:50:53,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:50:53,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 09:50:53,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 09:50:53,508 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:50:53,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:50:53,542 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2023-12-20 09:50:53,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 09:50:53,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-12-20 09:50:53,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:50:53,543 INFO L225 Difference]: With dead ends: 28 [2023-12-20 09:50:53,543 INFO L226 Difference]: Without dead ends: 21 [2023-12-20 09:50:53,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-20 09:50:53,545 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 09:50:53,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 33 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 09:50:53,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-20 09:50:53,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2023-12-20 09:50:53,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:50:53,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-12-20 09:50:53,549 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 17 [2023-12-20 09:50:53,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:50:53,550 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-12-20 09:50:53,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:50:53,551 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-12-20 09:50:53,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-20 09:50:53,551 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:50:53,551 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:50:53,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 09:50:53,552 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:50:53,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:50:53,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1125781931, now seen corresponding path program 1 times [2023-12-20 09:50:53,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:50:53,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265406572] [2023-12-20 09:50:53,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:50:53,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:50:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:54,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:50:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:54,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:50:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:50:54,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:50:54,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265406572] [2023-12-20 09:50:54,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265406572] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:50:54,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511964702] [2023-12-20 09:50:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:50:54,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:50:54,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:50:54,056 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) [2023-12-20 09:50:54,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 09:50:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:54,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-20 09:50:54,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:50:54,209 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 30 treesize of output 31 [2023-12-20 09:50:54,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:50:54,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:50:54,429 INFO L349 Elim1Store]: treesize reduction 10, result has 52.4 percent of original size [2023-12-20 09:50:54,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 36 [2023-12-20 09:50:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:50:54,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511964702] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:50:54,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:50:54,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-20 09:50:54,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923769074] [2023-12-20 09:50:54,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:50:54,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-20 09:50:54,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:50:54,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-20 09:50:54,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-12-20 09:50:54,465 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:50:54,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:50:54,573 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2023-12-20 09:50:54,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 09:50:54,573 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2023-12-20 09:50:54,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:50:54,574 INFO L225 Difference]: With dead ends: 21 [2023-12-20 09:50:54,575 INFO L226 Difference]: Without dead ends: 19 [2023-12-20 09:50:54,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-12-20 09:50:54,580 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 09:50:54,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 61 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 09:50:54,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-20 09:50:54,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2023-12-20 09:50:54,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:50:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-12-20 09:50:54,590 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 18 [2023-12-20 09:50:54,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:50:54,590 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-12-20 09:50:54,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:50:54,590 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-12-20 09:50:54,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-20 09:50:54,591 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:50:54,591 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:50:54,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 09:50:54,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:50:54,804 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:50:54,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:50:54,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1224889556, now seen corresponding path program 1 times [2023-12-20 09:50:54,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:50:54,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372210280] [2023-12-20 09:50:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:50:54,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:50:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:54,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:50:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:54,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:50:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 09:50:54,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:50:54,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372210280] [2023-12-20 09:50:54,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372210280] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:50:54,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98548294] [2023-12-20 09:50:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:50:54,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:50:54,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:50:54,935 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) [2023-12-20 09:50:54,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 09:50:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:54,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 09:50:54,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:50:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 09:50:55,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:50:55,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-20 09:50:55,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98548294] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:50:55,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:50:55,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-12-20 09:50:55,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279554163] [2023-12-20 09:50:55,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:50:55,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-20 09:50:55,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:50:55,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-20 09:50:55,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-12-20 09:50:55,170 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:50:55,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:50:55,225 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2023-12-20 09:50:55,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-20 09:50:55,226 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-12-20 09:50:55,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:50:55,227 INFO L225 Difference]: With dead ends: 33 [2023-12-20 09:50:55,227 INFO L226 Difference]: Without dead ends: 25 [2023-12-20 09:50:55,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-12-20 09:50:55,230 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 09:50:55,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 43 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 09:50:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-20 09:50:55,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2023-12-20 09:50:55,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:50:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-12-20 09:50:55,240 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 21 [2023-12-20 09:50:55,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:50:55,240 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-12-20 09:50:55,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:50:55,241 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-12-20 09:50:55,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-20 09:50:55,241 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:50:55,243 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:50:55,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 09:50:55,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-20 09:50:55,458 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:50:55,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:50:55,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1346228729, now seen corresponding path program 2 times [2023-12-20 09:50:55,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:50:55,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709369427] [2023-12-20 09:50:55,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:50:55,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:50:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:55,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:50:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:55,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:50:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:50:55,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:50:55,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709369427] [2023-12-20 09:50:55,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709369427] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:50:55,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455694667] [2023-12-20 09:50:55,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:50:55,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:50:55,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:50:55,766 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) [2023-12-20 09:50:55,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 09:50:55,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 09:50:55,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:50:55,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-20 09:50:55,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:50:55,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2023-12-20 09:50:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 09:50:56,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:50:56,270 INFO L349 Elim1Store]: treesize reduction 10, result has 52.4 percent of original size [2023-12-20 09:50:56,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 38 [2023-12-20 09:50:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:50:56,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455694667] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:50:56,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:50:56,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 22 [2023-12-20 09:50:56,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809434726] [2023-12-20 09:50:56,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:50:56,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-20 09:50:56,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:50:56,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-20 09:50:56,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-12-20 09:50:56,355 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:50:56,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:50:56,683 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2023-12-20 09:50:56,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 09:50:56,683 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2023-12-20 09:50:56,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:50:56,684 INFO L225 Difference]: With dead ends: 25 [2023-12-20 09:50:56,684 INFO L226 Difference]: Without dead ends: 23 [2023-12-20 09:50:56,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2023-12-20 09:50:56,685 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 09:50:56,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 74 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 09:50:56,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-20 09:50:56,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-12-20 09:50:56,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:50:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-12-20 09:50:56,691 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 22 [2023-12-20 09:50:56,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:50:56,692 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-12-20 09:50:56,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:50:56,692 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-12-20 09:50:56,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-20 09:50:56,693 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:50:56,693 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:50:56,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 09:50:56,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:50:56,899 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:50:56,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:50:56,900 INFO L85 PathProgramCache]: Analyzing trace with hash 909762896, now seen corresponding path program 3 times [2023-12-20 09:50:56,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:50:56,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751915793] [2023-12-20 09:50:56,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:50:56,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:50:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:57,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:50:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:57,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:50:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:57,257 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:50:57,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:50:57,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751915793] [2023-12-20 09:50:57,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751915793] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:50:57,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955319339] [2023-12-20 09:50:57,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 09:50:57,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:50:57,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:50:57,259 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) [2023-12-20 09:50:57,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 09:50:57,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-20 09:50:57,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:50:57,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-20 09:50:57,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:50:57,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2023-12-20 09:50:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 09:50:57,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:50:57,791 INFO L349 Elim1Store]: treesize reduction 10, result has 52.4 percent of original size [2023-12-20 09:50:57,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 38 [2023-12-20 09:50:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:50:57,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955319339] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:50:57,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:50:57,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 10] total 28 [2023-12-20 09:50:57,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742444762] [2023-12-20 09:50:57,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:50:57,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-20 09:50:57,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:50:57,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-20 09:50:57,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2023-12-20 09:50:57,884 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:50:58,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:50:58,692 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2023-12-20 09:50:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-20 09:50:58,692 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-12-20 09:50:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:50:58,693 INFO L225 Difference]: With dead ends: 57 [2023-12-20 09:50:58,693 INFO L226 Difference]: Without dead ends: 55 [2023-12-20 09:50:58,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=536, Invalid=2326, Unknown=0, NotChecked=0, Total=2862 [2023-12-20 09:50:58,694 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 100 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 09:50:58,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 145 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 09:50:58,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-20 09:50:58,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2023-12-20 09:50:58,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:50:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-12-20 09:50:58,702 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2023-12-20 09:50:58,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:50:58,702 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-12-20 09:50:58,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 27 states have internal predecessors, (46), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:50:58,702 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-12-20 09:50:58,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-20 09:50:58,703 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:50:58,703 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:50:58,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-20 09:50:58,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:50:58,916 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:50:58,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:50:58,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1905423184, now seen corresponding path program 4 times [2023-12-20 09:50:58,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:50:58,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359643599] [2023-12-20 09:50:58,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:50:58,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:50:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:59,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:50:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:59,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:50:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:50:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:50:59,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:50:59,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359643599] [2023-12-20 09:50:59,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359643599] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:50:59,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092918196] [2023-12-20 09:50:59,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 09:50:59,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:50:59,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:50:59,360 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) [2023-12-20 09:50:59,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 09:50:59,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 09:50:59,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:50:59,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-20 09:50:59,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:50:59,496 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 36 treesize of output 37 [2023-12-20 09:50:59,542 INFO L349 Elim1Store]: treesize reduction 142, result has 13.4 percent of original size [2023-12-20 09:50:59,542 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 83 treesize of output 89 [2023-12-20 09:50:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:50:59,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:51:00,328 INFO L349 Elim1Store]: treesize reduction 69, result has 16.9 percent of original size [2023-12-20 09:51:00,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 91 treesize of output 59 [2023-12-20 09:51:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:00,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092918196] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:51:00,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:51:00,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2023-12-20 09:51:00,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149817231] [2023-12-20 09:51:00,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:51:00,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-20 09:51:00,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:51:00,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-20 09:51:00,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2023-12-20 09:51:00,349 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:51:01,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:51:01,155 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2023-12-20 09:51:01,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-20 09:51:01,157 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-12-20 09:51:01,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:51:01,157 INFO L225 Difference]: With dead ends: 60 [2023-12-20 09:51:01,157 INFO L226 Difference]: Without dead ends: 58 [2023-12-20 09:51:01,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=360, Invalid=1992, Unknown=0, NotChecked=0, Total=2352 [2023-12-20 09:51:01,159 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 49 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 09:51:01,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 195 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 09:51:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-20 09:51:01,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 25. [2023-12-20 09:51:01,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:51:01,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-12-20 09:51:01,167 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 27 [2023-12-20 09:51:01,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:51:01,167 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-12-20 09:51:01,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:51:01,167 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-12-20 09:51:01,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-20 09:51:01,168 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:51:01,168 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:51:01,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 09:51:01,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:51:01,377 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:51:01,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:51:01,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1508015463, now seen corresponding path program 5 times [2023-12-20 09:51:01,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:51:01,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551445959] [2023-12-20 09:51:01,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:51:01,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:51:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:01,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:51:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:01,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:51:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:01,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:51:01,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551445959] [2023-12-20 09:51:01,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551445959] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:51:01,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810828910] [2023-12-20 09:51:01,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 09:51:01,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:51:01,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:51:01,816 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) [2023-12-20 09:51:01,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 09:51:01,880 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-12-20 09:51:01,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:51:01,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-20 09:51:01,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:51:01,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2023-12-20 09:51:02,027 INFO L349 Elim1Store]: treesize reduction 145, result has 14.2 percent of original size [2023-12-20 09:51:02,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 87 [2023-12-20 09:51:02,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:02,734 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-20 09:51:02,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:02,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:02,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:02,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:02,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:51:02,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 113 treesize of output 74 [2023-12-20 09:51:02,746 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-20 09:51:02,747 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:51:02,747 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 46 treesize of output 20 [2023-12-20 09:51:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 09:51:02,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:51:03,066 INFO L349 Elim1Store]: treesize reduction 20, result has 75.9 percent of original size [2023-12-20 09:51:03,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 91 treesize of output 108 [2023-12-20 09:51:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:03,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810828910] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:51:03,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:51:03,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 12] total 33 [2023-12-20 09:51:03,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482873991] [2023-12-20 09:51:03,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:51:03,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-20 09:51:03,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:51:03,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-20 09:51:03,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2023-12-20 09:51:03,151 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 32 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-20 09:51:05,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:51:05,496 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2023-12-20 09:51:05,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-20 09:51:05,496 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 32 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-12-20 09:51:05,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:51:05,497 INFO L225 Difference]: With dead ends: 65 [2023-12-20 09:51:05,497 INFO L226 Difference]: Without dead ends: 46 [2023-12-20 09:51:05,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=724, Invalid=3436, Unknown=0, NotChecked=0, Total=4160 [2023-12-20 09:51:05,499 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 78 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-20 09:51:05,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 177 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-20 09:51:05,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-20 09:51:05,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 32. [2023-12-20 09:51:05,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:51:05,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-12-20 09:51:05,511 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 28 [2023-12-20 09:51:05,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:51:05,511 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-12-20 09:51:05,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 32 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-20 09:51:05,512 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-12-20 09:51:05,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-20 09:51:05,514 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:51:05,516 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:51:05,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 09:51:05,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:51:05,725 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:51:05,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:51:05,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1756895628, now seen corresponding path program 6 times [2023-12-20 09:51:05,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:51:05,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012610495] [2023-12-20 09:51:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:51:05,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:51:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:06,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:51:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:06,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:51:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:06,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:51:06,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012610495] [2023-12-20 09:51:06,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012610495] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:51:06,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322115666] [2023-12-20 09:51:06,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 09:51:06,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:51:06,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:51:06,170 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) [2023-12-20 09:51:06,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 09:51:06,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-20 09:51:06,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:51:06,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-20 09:51:06,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:51:06,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2023-12-20 09:51:06,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:06,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:06,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:06,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:06,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:51:06,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 77 [2023-12-20 09:51:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 09:51:07,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:51:07,830 INFO L349 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2023-12-20 09:51:07,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 91 treesize of output 66 [2023-12-20 09:51:08,109 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:08,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322115666] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:51:08,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:51:08,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 13] total 37 [2023-12-20 09:51:08,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60843811] [2023-12-20 09:51:08,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:51:08,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-20 09:51:08,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:51:08,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-20 09:51:08,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2023-12-20 09:51:08,113 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 36 states have internal predecessors, (64), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:51:09,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:51:09,860 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2023-12-20 09:51:09,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-20 09:51:09,861 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 36 states have internal predecessors, (64), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2023-12-20 09:51:09,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:51:09,861 INFO L225 Difference]: With dead ends: 70 [2023-12-20 09:51:09,861 INFO L226 Difference]: Without dead ends: 68 [2023-12-20 09:51:09,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=594, Invalid=3828, Unknown=0, NotChecked=0, Total=4422 [2023-12-20 09:51:09,863 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 54 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 09:51:09,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 376 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 09:51:09,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-20 09:51:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 29. [2023-12-20 09:51:09,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:51:09,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-12-20 09:51:09,874 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 31 [2023-12-20 09:51:09,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:51:09,874 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-12-20 09:51:09,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 36 states have internal predecessors, (64), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:51:09,874 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-12-20 09:51:09,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-20 09:51:09,875 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:51:09,875 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:51:09,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 09:51:10,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:51:10,082 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:51:10,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:51:10,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1381876491, now seen corresponding path program 7 times [2023-12-20 09:51:10,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:51:10,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523735402] [2023-12-20 09:51:10,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:51:10,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:51:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:10,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:51:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:10,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:51:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:10,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:51:10,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523735402] [2023-12-20 09:51:10,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523735402] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:51:10,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66722545] [2023-12-20 09:51:10,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 09:51:10,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:51:10,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:51:10,528 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) [2023-12-20 09:51:10,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 09:51:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:10,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-20 09:51:10,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:51:10,699 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 36 treesize of output 37 [2023-12-20 09:51:10,753 INFO L349 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2023-12-20 09:51:10,754 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 73 treesize of output 79 [2023-12-20 09:51:11,205 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 09:51:11,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:51:11,471 INFO L349 Elim1Store]: treesize reduction 40, result has 34.4 percent of original size [2023-12-20 09:51:11,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 67 [2023-12-20 09:51:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:11,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66722545] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:51:11,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:51:11,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 13] total 37 [2023-12-20 09:51:11,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174099387] [2023-12-20 09:51:11,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:51:11,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-20 09:51:11,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:51:11,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-20 09:51:11,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2023-12-20 09:51:11,563 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:51:13,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:51:13,410 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2023-12-20 09:51:13,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-12-20 09:51:13,411 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-12-20 09:51:13,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:51:13,411 INFO L225 Difference]: With dead ends: 78 [2023-12-20 09:51:13,411 INFO L226 Difference]: Without dead ends: 76 [2023-12-20 09:51:13,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=902, Invalid=5104, Unknown=0, NotChecked=0, Total=6006 [2023-12-20 09:51:13,413 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 213 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 09:51:13,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 161 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 09:51:13,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-20 09:51:13,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 37. [2023-12-20 09:51:13,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:51:13,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-12-20 09:51:13,429 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 32 [2023-12-20 09:51:13,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:51:13,429 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-12-20 09:51:13,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:51:13,429 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-12-20 09:51:13,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-20 09:51:13,430 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:51:13,430 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:51:13,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 09:51:13,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-20 09:51:13,631 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:51:13,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:51:13,632 INFO L85 PathProgramCache]: Analyzing trace with hash 226229708, now seen corresponding path program 8 times [2023-12-20 09:51:13,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:51:13,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147161391] [2023-12-20 09:51:13,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:51:13,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:51:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:14,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:51:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:14,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:51:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:14,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:51:14,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147161391] [2023-12-20 09:51:14,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147161391] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:51:14,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102582116] [2023-12-20 09:51:14,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:51:14,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:51:14,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:51:14,139 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) [2023-12-20 09:51:14,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 09:51:14,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 09:51:14,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:51:14,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-20 09:51:14,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:51:14,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2023-12-20 09:51:14,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:14,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:14,345 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:51:14,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 67 [2023-12-20 09:51:14,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:14,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:14,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:14,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:14,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:51:14,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 103 [2023-12-20 09:51:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 09:51:15,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:51:15,531 INFO L349 Elim1Store]: treesize reduction 106, result has 17.8 percent of original size [2023-12-20 09:51:15,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 119 treesize of output 81 [2023-12-20 09:51:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:15,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102582116] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:51:15,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:51:15,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 14] total 40 [2023-12-20 09:51:15,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435603996] [2023-12-20 09:51:15,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:51:15,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-20 09:51:15,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:51:15,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-20 09:51:15,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1296, Unknown=0, NotChecked=0, Total=1560 [2023-12-20 09:51:15,605 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:51:17,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:51:17,581 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2023-12-20 09:51:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-12-20 09:51:17,581 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-12-20 09:51:17,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:51:17,582 INFO L225 Difference]: With dead ends: 101 [2023-12-20 09:51:17,582 INFO L226 Difference]: Without dead ends: 99 [2023-12-20 09:51:17,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1126, Invalid=5036, Unknown=0, NotChecked=0, Total=6162 [2023-12-20 09:51:17,584 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 109 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 09:51:17,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 187 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 09:51:17,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-20 09:51:17,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 56. [2023-12-20 09:51:17,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:51:17,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2023-12-20 09:51:17,618 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 35 [2023-12-20 09:51:17,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:51:17,618 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2023-12-20 09:51:17,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.9) internal successors, (76), 39 states have internal predecessors, (76), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:51:17,619 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2023-12-20 09:51:17,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-20 09:51:17,619 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:51:17,619 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:51:17,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-20 09:51:17,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:51:17,824 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:51:17,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:51:17,825 INFO L85 PathProgramCache]: Analyzing trace with hash 595307595, now seen corresponding path program 9 times [2023-12-20 09:51:17,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:51:17,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614882683] [2023-12-20 09:51:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:51:17,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:51:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:18,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:51:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:18,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:51:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:18,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:51:18,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614882683] [2023-12-20 09:51:18,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614882683] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:51:18,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958609660] [2023-12-20 09:51:18,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 09:51:18,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:51:18,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:51:18,578 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) [2023-12-20 09:51:18,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 09:51:18,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-20 09:51:18,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:51:18,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-20 09:51:18,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:51:18,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2023-12-20 09:51:18,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:18,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:18,979 INFO L349 Elim1Store]: treesize reduction 69, result has 21.6 percent of original size [2023-12-20 09:51:18,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 77 [2023-12-20 09:51:19,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:19,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:19,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:19,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:19,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:19,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:19,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:19,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:19,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:19,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:19,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:19,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:19,103 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:51:19,104 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 123 [2023-12-20 09:51:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:20,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:51:20,668 INFO L349 Elim1Store]: treesize reduction 156, result has 16.6 percent of original size [2023-12-20 09:51:20,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 129 treesize of output 94 [2023-12-20 09:51:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:21,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958609660] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:51:21,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:51:21,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 43 [2023-12-20 09:51:21,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919763364] [2023-12-20 09:51:21,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:51:21,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-20 09:51:21,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:51:21,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-20 09:51:21,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2023-12-20 09:51:21,122 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 43 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:51:26,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:51:26,682 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2023-12-20 09:51:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-20 09:51:26,683 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 43 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2023-12-20 09:51:26,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:51:26,683 INFO L225 Difference]: With dead ends: 112 [2023-12-20 09:51:26,683 INFO L226 Difference]: Without dead ends: 110 [2023-12-20 09:51:26,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2214 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=826, Invalid=7546, Unknown=0, NotChecked=0, Total=8372 [2023-12-20 09:51:26,686 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 118 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 72 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-12-20 09:51:26,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 639 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1385 Invalid, 4 Unknown, 0 Unchecked, 2.8s Time] [2023-12-20 09:51:26,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-12-20 09:51:26,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 41. [2023-12-20 09:51:26,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:51:26,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2023-12-20 09:51:26,712 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 36 [2023-12-20 09:51:26,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:51:26,712 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2023-12-20 09:51:26,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 43 states have internal predecessors, (74), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:51:26,713 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2023-12-20 09:51:26,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-20 09:51:26,713 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:51:26,713 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:51:26,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-20 09:51:26,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-20 09:51:26,928 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:51:26,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:51:26,929 INFO L85 PathProgramCache]: Analyzing trace with hash 810762091, now seen corresponding path program 10 times [2023-12-20 09:51:26,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:51:26,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813078611] [2023-12-20 09:51:26,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:51:26,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:51:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:27,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:51:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:27,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:51:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:27,107 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 41 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:27,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:51:27,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813078611] [2023-12-20 09:51:27,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813078611] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:51:27,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118656200] [2023-12-20 09:51:27,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 09:51:27,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:51:27,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:51:27,112 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) [2023-12-20 09:51:27,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 09:51:27,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 09:51:27,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:51:27,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-20 09:51:27,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:51:27,406 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:27,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:51:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:27,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118656200] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:51:27,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:51:27,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2023-12-20 09:51:27,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779207205] [2023-12-20 09:51:27,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:51:27,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 09:51:27,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:51:27,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 09:51:27,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2023-12-20 09:51:27,506 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:51:27,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:51:27,652 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2023-12-20 09:51:27,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 09:51:27,652 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2023-12-20 09:51:27,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:51:27,653 INFO L225 Difference]: With dead ends: 78 [2023-12-20 09:51:27,654 INFO L226 Difference]: Without dead ends: 53 [2023-12-20 09:51:27,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 61 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=522, Unknown=0, NotChecked=0, Total=702 [2023-12-20 09:51:27,655 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 09:51:27,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 142 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 09:51:27,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-20 09:51:27,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2023-12-20 09:51:27,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:51:27,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-12-20 09:51:27,700 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 38 [2023-12-20 09:51:27,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:51:27,700 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-12-20 09:51:27,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:51:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-12-20 09:51:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-20 09:51:27,702 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:51:27,702 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:51:27,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 09:51:27,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-20 09:51:27,903 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:51:27,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:51:27,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1783665168, now seen corresponding path program 11 times [2023-12-20 09:51:27,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:51:27,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939600840] [2023-12-20 09:51:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:51:27,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:51:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:28,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:51:28,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:28,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:51:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:28,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:51:28,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939600840] [2023-12-20 09:51:28,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939600840] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:51:28,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842047778] [2023-12-20 09:51:28,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 09:51:28,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:51:28,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:51:28,600 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) [2023-12-20 09:51:28,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 09:51:28,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-20 09:51:28,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:51:28,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-20 09:51:28,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:51:28,779 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 36 treesize of output 37 [2023-12-20 09:51:28,828 INFO L349 Elim1Store]: treesize reduction 54, result has 28.9 percent of original size [2023-12-20 09:51:28,829 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 73 treesize of output 79 [2023-12-20 09:51:28,895 INFO L349 Elim1Store]: treesize reduction 70, result has 23.9 percent of original size [2023-12-20 09:51:28,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 109 treesize of output 121 [2023-12-20 09:51:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:29,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:51:30,304 INFO L349 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2023-12-20 09:51:30,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 115 treesize of output 75 [2023-12-20 09:51:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:30,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842047778] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:51:30,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:51:30,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 45 [2023-12-20 09:51:30,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936211035] [2023-12-20 09:51:30,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:51:30,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-12-20 09:51:30,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:51:30,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-12-20 09:51:30,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1751, Unknown=0, NotChecked=0, Total=1980 [2023-12-20 09:51:30,393 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 45 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:51:33,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:51:33,119 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2023-12-20 09:51:33,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-12-20 09:51:33,119 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 45 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2023-12-20 09:51:33,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:51:33,120 INFO L225 Difference]: With dead ends: 118 [2023-12-20 09:51:33,120 INFO L226 Difference]: Without dead ends: 116 [2023-12-20 09:51:33,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2261 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1371, Invalid=8331, Unknown=0, NotChecked=0, Total=9702 [2023-12-20 09:51:33,122 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 273 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 09:51:33,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 332 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 09:51:33,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-12-20 09:51:33,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 64. [2023-12-20 09:51:33,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 60 states have (on average 1.15) internal successors, (69), 60 states have internal predecessors, (69), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:51:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2023-12-20 09:51:33,161 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 39 [2023-12-20 09:51:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:51:33,161 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2023-12-20 09:51:33,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 45 states have internal predecessors, (85), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:51:33,161 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2023-12-20 09:51:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-20 09:51:33,162 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:51:33,162 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:51:33,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-20 09:51:33,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-20 09:51:33,368 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:51:33,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:51:33,369 INFO L85 PathProgramCache]: Analyzing trace with hash 2070949543, now seen corresponding path program 12 times [2023-12-20 09:51:33,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:51:33,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907159124] [2023-12-20 09:51:33,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:51:33,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:51:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:33,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:51:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:33,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:51:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 75 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:33,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:51:33,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907159124] [2023-12-20 09:51:33,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907159124] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:51:33,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117356605] [2023-12-20 09:51:33,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 09:51:33,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:51:33,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:51:33,984 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) [2023-12-20 09:51:33,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-20 09:51:34,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-20 09:51:34,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:51:34,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-20 09:51:34,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:51:34,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2023-12-20 09:51:34,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:34,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:34,470 INFO L349 Elim1Store]: treesize reduction 69, result has 21.6 percent of original size [2023-12-20 09:51:34,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 77 [2023-12-20 09:51:34,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:34,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:34,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:34,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:34,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:34,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:34,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:34,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:34,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:34,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:34,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:34,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:34,562 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:51:34,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 123 [2023-12-20 09:51:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 09:51:36,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:51:36,853 INFO L349 Elim1Store]: treesize reduction 156, result has 16.6 percent of original size [2023-12-20 09:51:36,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 129 treesize of output 94 [2023-12-20 09:51:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 3 proven. 73 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:37,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117356605] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:51:37,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:51:37,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 18] total 52 [2023-12-20 09:51:37,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017572481] [2023-12-20 09:51:37,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:51:37,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-20 09:51:37,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:51:37,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-20 09:51:37,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=2381, Unknown=0, NotChecked=0, Total=2652 [2023-12-20 09:51:37,543 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand has 52 states, 52 states have (on average 1.75) internal successors, (91), 51 states have internal predecessors, (91), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:51:43,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:51:43,798 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2023-12-20 09:51:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-12-20 09:51:43,798 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.75) internal successors, (91), 51 states have internal predecessors, (91), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2023-12-20 09:51:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:51:43,799 INFO L225 Difference]: With dead ends: 129 [2023-12-20 09:51:43,799 INFO L226 Difference]: Without dead ends: 127 [2023-12-20 09:51:43,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3325 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1080, Invalid=10262, Unknown=0, NotChecked=0, Total=11342 [2023-12-20 09:51:43,802 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 220 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1795 mSolverCounterSat, 119 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 1919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1795 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-20 09:51:43,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 778 Invalid, 1919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1795 Invalid, 5 Unknown, 0 Unchecked, 3.1s Time] [2023-12-20 09:51:43,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-12-20 09:51:43,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 46. [2023-12-20 09:51:43,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:51:43,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2023-12-20 09:51:43,832 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 40 [2023-12-20 09:51:43,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:51:43,832 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2023-12-20 09:51:43,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.75) internal successors, (91), 51 states have internal predecessors, (91), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:51:43,832 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2023-12-20 09:51:43,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-20 09:51:43,832 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:51:43,833 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:51:43,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-20 09:51:44,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-20 09:51:44,037 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:51:44,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:51:44,037 INFO L85 PathProgramCache]: Analyzing trace with hash 171584711, now seen corresponding path program 13 times [2023-12-20 09:51:44,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:51:44,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140194677] [2023-12-20 09:51:44,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:51:44,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:51:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:44,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:51:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:44,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:51:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:44,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:51:44,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140194677] [2023-12-20 09:51:44,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140194677] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:51:44,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69293244] [2023-12-20 09:51:44,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 09:51:44,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:51:44,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:51:44,801 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) [2023-12-20 09:51:44,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-20 09:51:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:44,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-20 09:51:44,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:51:44,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2023-12-20 09:51:45,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:45,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:45,011 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:51:45,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 67 [2023-12-20 09:51:45,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:45,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:45,086 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-12-20 09:51:45,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 91 treesize of output 103 [2023-12-20 09:51:45,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:45,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:45,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:45,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:45,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:45,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:45,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:45,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:45,169 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:51:45,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 121 treesize of output 139 [2023-12-20 09:51:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 09:51:46,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:51:46,708 INFO L349 Elim1Store]: treesize reduction 156, result has 15.7 percent of original size [2023-12-20 09:51:46,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 153 treesize of output 103 [2023-12-20 09:51:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:46,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69293244] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:51:46,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:51:46,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 17] total 49 [2023-12-20 09:51:46,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801013935] [2023-12-20 09:51:46,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:51:46,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-20 09:51:46,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:51:46,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-20 09:51:46,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2052, Unknown=0, NotChecked=0, Total=2352 [2023-12-20 09:51:46,785 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:51:49,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:51:49,625 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2023-12-20 09:51:49,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-12-20 09:51:49,625 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2023-12-20 09:51:49,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:51:49,626 INFO L225 Difference]: With dead ends: 104 [2023-12-20 09:51:49,626 INFO L226 Difference]: Without dead ends: 102 [2023-12-20 09:51:49,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1441, Invalid=8065, Unknown=0, NotChecked=0, Total=9506 [2023-12-20 09:51:49,627 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 228 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-20 09:51:49,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 225 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-20 09:51:49,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-20 09:51:49,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 49. [2023-12-20 09:51:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:51:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-12-20 09:51:49,669 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 42 [2023-12-20 09:51:49,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:51:49,669 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-12-20 09:51:49,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:51:49,669 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-12-20 09:51:49,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-20 09:51:49,671 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:51:49,671 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:51:49,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-20 09:51:49,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:51:49,872 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:51:49,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:51:49,872 INFO L85 PathProgramCache]: Analyzing trace with hash 674261648, now seen corresponding path program 14 times [2023-12-20 09:51:49,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:51:49,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377000810] [2023-12-20 09:51:49,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:51:49,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:51:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:50,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:51:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:50,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:51:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 78 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:50,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:51:50,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377000810] [2023-12-20 09:51:50,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377000810] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:51:50,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750681501] [2023-12-20 09:51:50,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:51:50,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:51:50,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:51:50,096 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) [2023-12-20 09:51:50,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-20 09:51:50,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 09:51:50,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:51:50,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 09:51:50,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:51:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 100 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:50,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:51:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 100 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:50,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750681501] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:51:50,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:51:50,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2023-12-20 09:51:50,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669945739] [2023-12-20 09:51:50,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:51:50,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-20 09:51:50,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:51:50,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-20 09:51:50,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2023-12-20 09:51:50,457 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:51:50,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:51:50,615 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2023-12-20 09:51:50,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-20 09:51:50,615 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2023-12-20 09:51:50,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:51:50,616 INFO L225 Difference]: With dead ends: 95 [2023-12-20 09:51:50,616 INFO L226 Difference]: Without dead ends: 64 [2023-12-20 09:51:50,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 70 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2023-12-20 09:51:50,617 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 09:51:50,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 130 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 09:51:50,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-20 09:51:50,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 49. [2023-12-20 09:51:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:51:50,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-12-20 09:51:50,655 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 45 [2023-12-20 09:51:50,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:51:50,655 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-12-20 09:51:50,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 states have internal predecessors, (70), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:51:50,655 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-12-20 09:51:50,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-20 09:51:50,655 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:51:50,656 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:51:50,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-20 09:51:50,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-20 09:51:50,856 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:51:50,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:51:50,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1689792528, now seen corresponding path program 15 times [2023-12-20 09:51:50,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:51:50,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550994329] [2023-12-20 09:51:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:51:50,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:51:50,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:51,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:51:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:51,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:51:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:51:51,638 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 2 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:51,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:51:51,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550994329] [2023-12-20 09:51:51,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550994329] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:51:51,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470167213] [2023-12-20 09:51:51,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 09:51:51,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:51:51,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:51:51,640 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) [2023-12-20 09:51:51,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-20 09:51:52,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-20 09:51:52,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:51:52,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-20 09:51:52,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:51:52,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2023-12-20 09:51:52,585 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-12-20 09:51:52,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 67 [2023-12-20 09:51:52,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,674 INFO L349 Elim1Store]: treesize reduction 154, result has 19.4 percent of original size [2023-12-20 09:51:52,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 101 treesize of output 113 [2023-12-20 09:51:52,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:51:52,797 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:51:52,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 141 treesize of output 159 [2023-12-20 09:51:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 1 proven. 111 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:55,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:51:56,066 INFO L349 Elim1Store]: treesize reduction 278, result has 12.9 percent of original size [2023-12-20 09:51:56,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 169 treesize of output 123 [2023-12-20 09:51:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 6 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:51:56,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470167213] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:51:56,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:51:56,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 56 [2023-12-20 09:51:56,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898192350] [2023-12-20 09:51:56,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:51:56,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-12-20 09:51:56,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:51:56,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-12-20 09:51:56,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=2773, Unknown=0, NotChecked=0, Total=3080 [2023-12-20 09:51:56,731 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 56 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 56 states have internal predecessors, (101), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:52:03,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:52:03,230 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2023-12-20 09:52:03,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-12-20 09:52:03,230 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 56 states have internal predecessors, (101), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2023-12-20 09:52:03,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:52:03,231 INFO L225 Difference]: With dead ends: 125 [2023-12-20 09:52:03,231 INFO L226 Difference]: Without dead ends: 123 [2023-12-20 09:52:03,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4126 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1316, Invalid=13690, Unknown=0, NotChecked=0, Total=15006 [2023-12-20 09:52:03,232 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 244 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 2126 mSolverCounterSat, 147 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 2126 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-20 09:52:03,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 975 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 2126 Invalid, 1 Unknown, 0 Unchecked, 1.9s Time] [2023-12-20 09:52:03,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-12-20 09:52:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 43. [2023-12-20 09:52:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:52:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2023-12-20 09:52:03,276 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 45 [2023-12-20 09:52:03,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:52:03,276 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2023-12-20 09:52:03,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.8035714285714286) internal successors, (101), 56 states have internal predecessors, (101), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:52:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2023-12-20 09:52:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-20 09:52:03,276 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:52:03,276 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:52:03,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-20 09:52:03,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-20 09:52:03,477 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:52:03,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:52:03,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1319056277, now seen corresponding path program 16 times [2023-12-20 09:52:03,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:52:03,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997623704] [2023-12-20 09:52:03,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:52:03,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:52:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:52:04,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:52:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:52:04,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:52:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:52:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:52:04,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:52:04,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997623704] [2023-12-20 09:52:04,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997623704] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:52:04,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42835746] [2023-12-20 09:52:04,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 09:52:04,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:52:04,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:52:04,259 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) [2023-12-20 09:52:04,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-20 09:52:04,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 09:52:04,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:52:04,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-20 09:52:04,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:52:04,506 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 46 treesize of output 47 [2023-12-20 09:52:04,550 INFO L349 Elim1Store]: treesize reduction 73, result has 27.7 percent of original size [2023-12-20 09:52:04,550 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 95 treesize of output 101 [2023-12-20 09:52:04,621 INFO L349 Elim1Store]: treesize reduction 93, result has 23.1 percent of original size [2023-12-20 09:52:04,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 143 treesize of output 155 [2023-12-20 09:52:04,716 INFO L349 Elim1Store]: treesize reduction 177, result has 23.4 percent of original size [2023-12-20 09:52:04,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 189 treesize of output 207 [2023-12-20 09:52:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:52:06,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:52:07,472 INFO L349 Elim1Store]: treesize reduction 40, result has 38.5 percent of original size [2023-12-20 09:52:07,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 149 treesize of output 97 [2023-12-20 09:52:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:52:07,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42835746] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:52:07,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:52:07,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 52 [2023-12-20 09:52:07,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016784598] [2023-12-20 09:52:07,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:52:07,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-20 09:52:07,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:52:07,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-20 09:52:07,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=2310, Unknown=0, NotChecked=0, Total=2652 [2023-12-20 09:52:07,682 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 52 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:52:15,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:52:15,815 INFO L93 Difference]: Finished difference Result 149 states and 167 transitions. [2023-12-20 09:52:15,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-12-20 09:52:15,815 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 52 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2023-12-20 09:52:15,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:52:15,816 INFO L225 Difference]: With dead ends: 149 [2023-12-20 09:52:15,816 INFO L226 Difference]: Without dead ends: 147 [2023-12-20 09:52:15,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3773 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=2786, Invalid=13726, Unknown=0, NotChecked=0, Total=16512 [2023-12-20 09:52:15,817 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 301 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-20 09:52:15,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 365 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-20 09:52:15,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-12-20 09:52:15,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 84. [2023-12-20 09:52:15,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.125) internal successors, (90), 80 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:52:15,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2023-12-20 09:52:15,920 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 46 [2023-12-20 09:52:15,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:52:15,920 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2023-12-20 09:52:15,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 52 states have internal predecessors, (106), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:52:15,920 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2023-12-20 09:52:15,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-20 09:52:15,921 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:52:15,921 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:52:15,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-20 09:52:16,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:52:16,121 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:52:16,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:52:16,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1344538516, now seen corresponding path program 17 times [2023-12-20 09:52:16,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:52:16,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301591936] [2023-12-20 09:52:16,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:52:16,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:52:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:52:17,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:52:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:52:17,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:52:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:52:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:52:17,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:52:17,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301591936] [2023-12-20 09:52:17,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301591936] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:52:17,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923524792] [2023-12-20 09:52:17,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 09:52:17,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:52:17,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:52:17,016 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) [2023-12-20 09:52:17,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-20 09:52:17,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-12-20 09:52:17,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:52:17,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-20 09:52:17,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:52:17,321 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 30 treesize of output 31 [2023-12-20 09:52:17,365 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-12-20 09:52:17,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 67 [2023-12-20 09:52:17,427 INFO L349 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2023-12-20 09:52:17,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 91 treesize of output 103 [2023-12-20 09:52:17,522 INFO L349 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2023-12-20 09:52:17,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 121 treesize of output 139 [2023-12-20 09:52:17,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:17,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:17,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:17,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:17,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:17,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:17,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:17,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:17,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:17,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:17,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:17,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:17,604 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:52:17,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 45 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 151 treesize of output 175 [2023-12-20 09:52:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:52:19,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:52:19,834 INFO L349 Elim1Store]: treesize reduction 50, result has 38.3 percent of original size [2023-12-20 09:52:19,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 183 treesize of output 119 [2023-12-20 09:52:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:52:19,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923524792] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:52:19,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:52:19,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 56 [2023-12-20 09:52:19,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117707311] [2023-12-20 09:52:19,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:52:19,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-12-20 09:52:19,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:52:19,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-12-20 09:52:19,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=2669, Unknown=0, NotChecked=0, Total=3080 [2023-12-20 09:52:19,903 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 56 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:52:23,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:52:23,830 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2023-12-20 09:52:23,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-12-20 09:52:23,830 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 56 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2023-12-20 09:52:23,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:52:23,831 INFO L225 Difference]: With dead ends: 149 [2023-12-20 09:52:23,831 INFO L226 Difference]: Without dead ends: 147 [2023-12-20 09:52:23,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2971 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1774, Invalid=9782, Unknown=0, NotChecked=0, Total=11556 [2023-12-20 09:52:23,832 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 209 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 09:52:23,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 426 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1127 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 09:52:23,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-12-20 09:52:23,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 82. [2023-12-20 09:52:23,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 78 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:52:23,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2023-12-20 09:52:23,944 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 49 [2023-12-20 09:52:23,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:52:23,944 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2023-12-20 09:52:23,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 56 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:52:23,945 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2023-12-20 09:52:23,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-20 09:52:23,945 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:52:23,945 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:52:23,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-20 09:52:24,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:52:24,145 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:52:24,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:52:24,146 INFO L85 PathProgramCache]: Analyzing trace with hash -537681264, now seen corresponding path program 18 times [2023-12-20 09:52:24,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:52:24,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611754283] [2023-12-20 09:52:24,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:52:24,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:52:24,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:52:25,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:52:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:52:25,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:52:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:52:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:52:25,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:52:25,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611754283] [2023-12-20 09:52:25,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611754283] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:52:25,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580190797] [2023-12-20 09:52:25,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 09:52:25,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:52:25,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:52:25,114 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) [2023-12-20 09:52:25,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-20 09:52:25,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-12-20 09:52:25,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:52:25,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-20 09:52:25,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:52:25,493 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 33 treesize of output 34 [2023-12-20 09:52:25,558 INFO L349 Elim1Store]: treesize reduction 51, result has 30.1 percent of original size [2023-12-20 09:52:25,558 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 67 treesize of output 73 [2023-12-20 09:52:25,648 INFO L349 Elim1Store]: treesize reduction 67, result has 24.7 percent of original size [2023-12-20 09:52:25,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 100 treesize of output 112 [2023-12-20 09:52:25,752 INFO L349 Elim1Store]: treesize reduction 134, result has 24.3 percent of original size [2023-12-20 09:52:25,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 133 treesize of output 151 [2023-12-20 09:52:25,889 INFO L349 Elim1Store]: treesize reduction 166, result has 20.6 percent of original size [2023-12-20 09:52:25,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 166 treesize of output 190 [2023-12-20 09:52:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:52:28,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:52:29,418 INFO L349 Elim1Store]: treesize reduction 50, result has 38.3 percent of original size [2023-12-20 09:52:29,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 183 treesize of output 119 [2023-12-20 09:52:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:52:29,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580190797] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:52:29,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:52:29,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 61 [2023-12-20 09:52:29,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840408106] [2023-12-20 09:52:29,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:52:29,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-12-20 09:52:29,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:52:29,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-12-20 09:52:29,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=3302, Unknown=0, NotChecked=0, Total=3660 [2023-12-20 09:52:29,630 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 61 states have internal predecessors, (127), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:52:36,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:52:36,824 INFO L93 Difference]: Finished difference Result 206 states and 218 transitions. [2023-12-20 09:52:36,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-12-20 09:52:36,824 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 61 states have internal predecessors, (127), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2023-12-20 09:52:36,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:52:36,825 INFO L225 Difference]: With dead ends: 206 [2023-12-20 09:52:36,825 INFO L226 Difference]: Without dead ends: 204 [2023-12-20 09:52:36,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4217 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=2231, Invalid=16401, Unknown=0, NotChecked=0, Total=18632 [2023-12-20 09:52:36,827 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 337 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 1661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-20 09:52:36,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 467 Invalid, 1661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-20 09:52:36,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-12-20 09:52:37,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 114. [2023-12-20 09:52:37,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 110 states have (on average 1.1181818181818182) internal successors, (123), 110 states have internal predecessors, (123), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:52:37,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 127 transitions. [2023-12-20 09:52:37,040 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 127 transitions. Word has length 53 [2023-12-20 09:52:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:52:37,040 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 127 transitions. [2023-12-20 09:52:37,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 61 states have internal predecessors, (127), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:52:37,040 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 127 transitions. [2023-12-20 09:52:37,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-20 09:52:37,041 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:52:37,041 INFO L195 NwaCegarLoop]: trace histogram [12, 9, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:52:37,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-20 09:52:37,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:52:37,248 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:52:37,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:52:37,248 INFO L85 PathProgramCache]: Analyzing trace with hash -101627888, now seen corresponding path program 19 times [2023-12-20 09:52:37,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:52:37,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162771923] [2023-12-20 09:52:37,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:52:37,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:52:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:52:38,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:52:38,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:52:38,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:52:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:52:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 2 proven. 176 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:52:38,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:52:38,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162771923] [2023-12-20 09:52:38,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162771923] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:52:38,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916272879] [2023-12-20 09:52:38,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 09:52:38,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:52:38,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:52:38,171 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) [2023-12-20 09:52:38,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-20 09:52:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:52:38,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 70 conjunts are in the unsatisfiable core [2023-12-20 09:52:38,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:52:38,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2023-12-20 09:52:38,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,663 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:52:38,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 67 [2023-12-20 09:52:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,768 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-12-20 09:52:38,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 91 treesize of output 103 [2023-12-20 09:52:38,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:38,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:52:38,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 131 treesize of output 149 [2023-12-20 09:52:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 09:52:40,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:52:41,391 INFO L349 Elim1Store]: treesize reduction 214, result has 16.1 percent of original size [2023-12-20 09:52:41,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 171 treesize of output 124 [2023-12-20 09:52:42,309 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 6 proven. 172 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:52:42,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916272879] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:52:42,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:52:42,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28, 25] total 73 [2023-12-20 09:52:42,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834140112] [2023-12-20 09:52:42,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:52:42,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-12-20 09:52:42,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:52:42,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-12-20 09:52:42,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=4821, Unknown=0, NotChecked=0, Total=5256 [2023-12-20 09:52:42,311 INFO L87 Difference]: Start difference. First operand 114 states and 127 transitions. Second operand has 73 states, 73 states have (on average 1.7808219178082192) internal successors, (130), 72 states have internal predecessors, (130), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:52:44,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-20 09:52:55,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:52:55,039 INFO L93 Difference]: Finished difference Result 256 states and 271 transitions. [2023-12-20 09:52:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-12-20 09:52:55,039 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.7808219178082192) internal successors, (130), 72 states have internal predecessors, (130), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2023-12-20 09:52:55,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:52:55,041 INFO L225 Difference]: With dead ends: 256 [2023-12-20 09:52:55,041 INFO L226 Difference]: Without dead ends: 254 [2023-12-20 09:52:55,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8020 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=2187, Invalid=26204, Unknown=1, NotChecked=0, Total=28392 [2023-12-20 09:52:55,043 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 623 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 3262 mSolverCounterSat, 336 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 3599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 3262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-12-20 09:52:55,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 1208 Invalid, 3599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 3262 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2023-12-20 09:52:55,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-12-20 09:52:55,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 75. [2023-12-20 09:52:55,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:52:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2023-12-20 09:52:55,169 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 53 [2023-12-20 09:52:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:52:55,169 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2023-12-20 09:52:55,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.7808219178082192) internal successors, (130), 72 states have internal predecessors, (130), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:52:55,169 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2023-12-20 09:52:55,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-20 09:52:55,170 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:52:55,170 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:52:55,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-20 09:52:55,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-20 09:52:55,371 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:52:55,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:52:55,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2124270553, now seen corresponding path program 20 times [2023-12-20 09:52:55,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:52:55,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709026198] [2023-12-20 09:52:55,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:52:55,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:52:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:52:56,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:52:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:52:56,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:52:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:52:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:52:56,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:52:56,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709026198] [2023-12-20 09:52:56,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709026198] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:52:56,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152420852] [2023-12-20 09:52:56,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:52:56,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:52:56,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:52:56,477 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) [2023-12-20 09:52:56,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-20 09:52:56,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 09:52:56,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:52:56,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-20 09:52:56,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:52:56,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2023-12-20 09:52:56,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:56,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:56,761 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:52:56,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 67 [2023-12-20 09:52:56,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:56,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:56,834 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-12-20 09:52:56,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 91 treesize of output 103 [2023-12-20 09:52:56,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:56,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:56,951 INFO L349 Elim1Store]: treesize reduction 112, result has 24.8 percent of original size [2023-12-20 09:52:56,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 22 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 121 treesize of output 139 [2023-12-20 09:52:57,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,088 INFO L349 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2023-12-20 09:52:57,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 35 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 151 treesize of output 175 [2023-12-20 09:52:57,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:52:57,211 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:52:57,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 66 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 181 treesize of output 211 [2023-12-20 09:52:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 09:52:59,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:53:00,762 INFO L349 Elim1Store]: treesize reduction 256, result has 13.8 percent of original size [2023-12-20 09:53:00,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 221 treesize of output 147 [2023-12-20 09:53:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:53:00,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152420852] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:53:00,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:53:00,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26, 23] total 67 [2023-12-20 09:53:00,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635100090] [2023-12-20 09:53:00,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:53:00,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-12-20 09:53:00,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:53:00,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-12-20 09:53:00,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=3747, Unknown=0, NotChecked=0, Total=4422 [2023-12-20 09:53:00,874 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:53:14,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:53:14,693 INFO L93 Difference]: Finished difference Result 279 states and 304 transitions. [2023-12-20 09:53:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2023-12-20 09:53:14,694 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2023-12-20 09:53:14,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:53:14,695 INFO L225 Difference]: With dead ends: 279 [2023-12-20 09:53:14,695 INFO L226 Difference]: Without dead ends: 277 [2023-12-20 09:53:14,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11784 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=6885, Invalid=30557, Unknown=0, NotChecked=0, Total=37442 [2023-12-20 09:53:14,698 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 472 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-20 09:53:14,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 454 Invalid, 1970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-20 09:53:14,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2023-12-20 09:53:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 103. [2023-12-20 09:53:14,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 99 states have internal predecessors, (110), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:53:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2023-12-20 09:53:14,912 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 56 [2023-12-20 09:53:14,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:53:14,913 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2023-12-20 09:53:14,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:53:14,913 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2023-12-20 09:53:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-20 09:53:14,914 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:53:14,914 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:53:14,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-20 09:53:15,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-20 09:53:15,117 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:53:15,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:53:15,117 INFO L85 PathProgramCache]: Analyzing trace with hash 982068683, now seen corresponding path program 21 times [2023-12-20 09:53:15,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:53:15,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899315827] [2023-12-20 09:53:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:53:15,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:53:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:53:16,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:53:16,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:53:16,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:53:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:53:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:53:16,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:53:16,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899315827] [2023-12-20 09:53:16,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899315827] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:53:16,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485274899] [2023-12-20 09:53:16,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 09:53:16,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:53:16,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:53:16,700 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:53:16,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-20 09:53:17,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-12-20 09:53:17,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:53:17,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 74 conjunts are in the unsatisfiable core [2023-12-20 09:53:17,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:53:17,242 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 33 treesize of output 34 [2023-12-20 09:53:17,295 INFO L349 Elim1Store]: treesize reduction 51, result has 30.1 percent of original size [2023-12-20 09:53:17,295 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 67 treesize of output 73 [2023-12-20 09:53:17,359 INFO L349 Elim1Store]: treesize reduction 67, result has 24.7 percent of original size [2023-12-20 09:53:17,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 100 treesize of output 112 [2023-12-20 09:53:17,463 INFO L349 Elim1Store]: treesize reduction 134, result has 24.3 percent of original size [2023-12-20 09:53:17,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 133 treesize of output 151 [2023-12-20 09:53:17,587 INFO L349 Elim1Store]: treesize reduction 166, result has 20.6 percent of original size [2023-12-20 09:53:17,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 166 treesize of output 190 [2023-12-20 09:53:17,748 INFO L349 Elim1Store]: treesize reduction 249, result has 20.4 percent of original size [2023-12-20 09:53:17,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 51 case distinctions, treesize of input 199 treesize of output 229 [2023-12-20 09:53:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 09:53:20,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:53:21,492 INFO L349 Elim1Store]: treesize reduction 392, result has 10.3 percent of original size [2023-12-20 09:53:21,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 227 treesize of output 154 [2023-12-20 09:53:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 250 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:53:21,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485274899] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:53:21,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:53:21,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 28, 25] total 73 [2023-12-20 09:53:21,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564510792] [2023-12-20 09:53:21,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:53:21,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-12-20 09:53:21,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:53:21,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-12-20 09:53:21,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=4630, Unknown=0, NotChecked=0, Total=5256 [2023-12-20 09:53:21,716 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:53:33,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:53:33,668 INFO L93 Difference]: Finished difference Result 255 states and 269 transitions. [2023-12-20 09:53:33,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-12-20 09:53:33,668 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2023-12-20 09:53:33,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:53:33,670 INFO L225 Difference]: With dead ends: 255 [2023-12-20 09:53:33,670 INFO L226 Difference]: Without dead ends: 253 [2023-12-20 09:53:33,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8836 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=3760, Invalid=27040, Unknown=0, NotChecked=0, Total=30800 [2023-12-20 09:53:33,672 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 225 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 2688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-20 09:53:33,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 499 Invalid, 2688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-20 09:53:33,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-12-20 09:53:33,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 141. [2023-12-20 09:53:33,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 137 states have (on average 1.102189781021898) internal successors, (151), 137 states have internal predecessors, (151), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:53:33,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2023-12-20 09:53:33,991 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 60 [2023-12-20 09:53:33,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:53:33,991 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2023-12-20 09:53:33,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:53:33,992 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2023-12-20 09:53:33,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-20 09:53:33,992 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:53:33,992 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:53:34,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-20 09:53:34,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:53:34,200 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:53:34,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:53:34,201 INFO L85 PathProgramCache]: Analyzing trace with hash -503866612, now seen corresponding path program 22 times [2023-12-20 09:53:34,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:53:34,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262725858] [2023-12-20 09:53:34,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:53:34,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:53:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:53:35,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:53:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:53:35,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:53:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:53:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:53:35,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:53:35,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262725858] [2023-12-20 09:53:35,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262725858] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:53:35,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128467627] [2023-12-20 09:53:35,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 09:53:35,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:53:35,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:53:35,656 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:53:35,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-20 09:53:35,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 09:53:35,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:53:35,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-20 09:53:35,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:53:36,023 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 32 treesize of output 33 [2023-12-20 09:53:36,075 INFO L349 Elim1Store]: treesize reduction 52, result has 27.8 percent of original size [2023-12-20 09:53:36,075 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 69 treesize of output 75 [2023-12-20 09:53:36,143 INFO L349 Elim1Store]: treesize reduction 70, result has 23.9 percent of original size [2023-12-20 09:53:36,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 105 treesize of output 117 [2023-12-20 09:53:36,242 INFO L349 Elim1Store]: treesize reduction 138, result has 22.9 percent of original size [2023-12-20 09:53:36,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 141 treesize of output 159 [2023-12-20 09:53:36,380 INFO L349 Elim1Store]: treesize reduction 172, result has 20.0 percent of original size [2023-12-20 09:53:36,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 177 treesize of output 201 [2023-12-20 09:53:36,581 INFO L349 Elim1Store]: treesize reduction 256, result has 19.5 percent of original size [2023-12-20 09:53:36,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 51 case distinctions, treesize of input 213 treesize of output 243 [2023-12-20 09:53:36,841 INFO L349 Elim1Store]: treesize reduction 306, result has 17.3 percent of original size [2023-12-20 09:53:36,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 72 case distinctions, treesize of input 249 treesize of output 285 [2023-12-20 09:53:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:53:40,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:53:42,646 INFO L349 Elim1Store]: treesize reduction 70, result has 38.1 percent of original size [2023-12-20 09:53:42,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 251 treesize of output 163 [2023-12-20 09:53:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:53:42,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128467627] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:53:42,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:53:42,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 75 [2023-12-20 09:53:42,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134538668] [2023-12-20 09:53:42,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:53:42,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-12-20 09:53:42,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:53:42,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-12-20 09:53:42,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=4871, Unknown=0, NotChecked=0, Total=5550 [2023-12-20 09:53:42,772 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 75 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 75 states have internal predecessors, (157), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:54:11,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:54:11,302 INFO L93 Difference]: Finished difference Result 405 states and 434 transitions. [2023-12-20 09:54:11,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2023-12-20 09:54:11,303 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 75 states have internal predecessors, (157), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2023-12-20 09:54:11,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:54:11,304 INFO L225 Difference]: With dead ends: 405 [2023-12-20 09:54:11,304 INFO L226 Difference]: Without dead ends: 403 [2023-12-20 09:54:11,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20240 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=11058, Invalid=54222, Unknown=0, NotChecked=0, Total=65280 [2023-12-20 09:54:11,309 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 904 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 3009 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 904 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 3453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 3009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-20 09:54:11,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [904 Valid, 759 Invalid, 3453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 3009 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-20 09:54:11,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2023-12-20 09:54:11,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 154. [2023-12-20 09:54:11,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 150 states have (on average 1.0933333333333333) internal successors, (164), 150 states have internal predecessors, (164), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:54:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 168 transitions. [2023-12-20 09:54:11,793 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 168 transitions. Word has length 63 [2023-12-20 09:54:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:54:11,794 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 168 transitions. [2023-12-20 09:54:11,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 75 states have internal predecessors, (157), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:54:11,794 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 168 transitions. [2023-12-20 09:54:11,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-20 09:54:11,794 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:54:11,794 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:54:11,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-20 09:54:12,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:54:12,002 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:54:12,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:54:12,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1278731943, now seen corresponding path program 23 times [2023-12-20 09:54:12,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:54:12,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326039004] [2023-12-20 09:54:12,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:54:12,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:54:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:54:13,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:54:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:54:13,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:54:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:54:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 1 proven. 291 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:54:13,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:54:13,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326039004] [2023-12-20 09:54:13,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326039004] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:54:13,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222293972] [2023-12-20 09:54:13,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 09:54:13,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:54:13,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:54:13,221 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:54:13,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-20 09:54:14,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-12-20 09:54:14,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:54:14,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 77 conjunts are in the unsatisfiable core [2023-12-20 09:54:14,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:54:14,089 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 30 treesize of output 31 [2023-12-20 09:54:14,149 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-12-20 09:54:14,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 67 [2023-12-20 09:54:14,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:14,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:14,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:14,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:14,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:14,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:14,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:14,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:14,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:14,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:14,220 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:54:14,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 113 [2023-12-20 09:54:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 292 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:54:16,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:54:16,983 INFO L349 Elim1Store]: treesize reduction 138, result has 18.3 percent of original size [2023-12-20 09:54:16,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 131 treesize of output 95 [2023-12-20 09:54:17,659 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 3 proven. 289 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:54:17,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222293972] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:54:17,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:54:17,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 75 [2023-12-20 09:54:17,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971265069] [2023-12-20 09:54:17,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:54:17,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-12-20 09:54:17,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:54:17,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-12-20 09:54:17,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=5157, Unknown=0, NotChecked=0, Total=5550 [2023-12-20 09:54:17,661 INFO L87 Difference]: Start difference. First operand 154 states and 168 transitions. Second operand has 75 states, 75 states have (on average 1.9733333333333334) internal successors, (148), 75 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:54:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:54:24,716 INFO L93 Difference]: Finished difference Result 365 states and 380 transitions. [2023-12-20 09:54:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-12-20 09:54:24,716 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.9733333333333334) internal successors, (148), 75 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 64 [2023-12-20 09:54:24,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:54:24,724 INFO L225 Difference]: With dead ends: 365 [2023-12-20 09:54:24,725 INFO L226 Difference]: Without dead ends: 363 [2023-12-20 09:54:24,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4148 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1196, Invalid=17710, Unknown=0, NotChecked=0, Total=18906 [2023-12-20 09:54:24,735 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 174 mSDsluCounter, 1712 mSDsCounter, 0 mSdLazyCounter, 4430 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1770 SdHoareTripleChecker+Invalid, 4496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 4430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-20 09:54:24,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1770 Invalid, 4496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 4430 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-20 09:54:24,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-12-20 09:54:25,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 118. [2023-12-20 09:54:25,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 114 states have (on average 1.1140350877192982) internal successors, (127), 114 states have internal predecessors, (127), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:54:25,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 131 transitions. [2023-12-20 09:54:25,178 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 131 transitions. Word has length 64 [2023-12-20 09:54:25,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:54:25,178 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 131 transitions. [2023-12-20 09:54:25,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.9733333333333334) internal successors, (148), 75 states have internal predecessors, (148), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:54:25,178 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 131 transitions. [2023-12-20 09:54:25,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-20 09:54:25,179 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:54:25,179 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:54:25,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-20 09:54:25,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-20 09:54:25,383 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:54:25,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:54:25,383 INFO L85 PathProgramCache]: Analyzing trace with hash -496992464, now seen corresponding path program 24 times [2023-12-20 09:54:25,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:54:25,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240025036] [2023-12-20 09:54:25,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:54:25,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:54:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:54:27,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:54:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:54:27,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:54:27,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:54:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:54:27,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:54:27,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240025036] [2023-12-20 09:54:27,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240025036] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:54:27,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282878554] [2023-12-20 09:54:27,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 09:54:27,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:54:27,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:54:27,319 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:54:27,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-20 09:54:28,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2023-12-20 09:54:28,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:54:28,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 78 conjunts are in the unsatisfiable core [2023-12-20 09:54:28,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:54:28,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2023-12-20 09:54:28,328 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-12-20 09:54:28,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 67 [2023-12-20 09:54:28,402 INFO L349 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2023-12-20 09:54:28,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 91 treesize of output 103 [2023-12-20 09:54:28,511 INFO L349 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2023-12-20 09:54:28,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 121 treesize of output 139 [2023-12-20 09:54:28,640 INFO L349 Elim1Store]: treesize reduction 160, result has 18.8 percent of original size [2023-12-20 09:54:28,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 33 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 151 treesize of output 175 [2023-12-20 09:54:28,824 INFO L349 Elim1Store]: treesize reduction 240, result has 18.6 percent of original size [2023-12-20 09:54:28,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 48 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 51 case distinctions, treesize of input 181 treesize of output 211 [2023-12-20 09:54:28,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:28,975 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:54:28,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 91 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 211 treesize of output 247 [2023-12-20 09:54:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:54:32,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:54:34,367 INFO L349 Elim1Store]: treesize reduction 70, result has 38.1 percent of original size [2023-12-20 09:54:34,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 251 treesize of output 163 [2023-12-20 09:54:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:54:34,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282878554] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:54:34,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:54:34,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 77 [2023-12-20 09:54:34,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796119799] [2023-12-20 09:54:34,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:54:34,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-12-20 09:54:34,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:54:34,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-12-20 09:54:34,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=713, Invalid=5139, Unknown=0, NotChecked=0, Total=5852 [2023-12-20 09:54:34,643 INFO L87 Difference]: Start difference. First operand 118 states and 131 transitions. Second operand has 77 states, 77 states have (on average 2.168831168831169) internal successors, (167), 77 states have internal predecessors, (167), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:54:52,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:54:52,647 INFO L93 Difference]: Finished difference Result 309 states and 325 transitions. [2023-12-20 09:54:52,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2023-12-20 09:54:52,648 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.168831168831169) internal successors, (167), 77 states have internal predecessors, (167), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 67 [2023-12-20 09:54:52,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:54:52,649 INFO L225 Difference]: With dead ends: 309 [2023-12-20 09:54:52,649 INFO L226 Difference]: Without dead ends: 307 [2023-12-20 09:54:52,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9116 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=4309, Invalid=28633, Unknown=0, NotChecked=0, Total=32942 [2023-12-20 09:54:52,652 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 427 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 2756 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 3045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 2756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-20 09:54:52,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 665 Invalid, 3045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 2756 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-20 09:54:52,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-12-20 09:54:53,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 162. [2023-12-20 09:54:53,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 158 states have (on average 1.1012658227848102) internal successors, (174), 158 states have internal predecessors, (174), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:54:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 178 transitions. [2023-12-20 09:54:53,104 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 178 transitions. Word has length 67 [2023-12-20 09:54:53,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:54:53,105 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 178 transitions. [2023-12-20 09:54:53,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.168831168831169) internal successors, (167), 77 states have internal predecessors, (167), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:54:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 178 transitions. [2023-12-20 09:54:53,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-20 09:54:53,106 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:54:53,106 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:54:53,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-20 09:54:53,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-20 09:54:53,314 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:54:53,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:54:53,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1145007225, now seen corresponding path program 25 times [2023-12-20 09:54:53,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:54:53,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150130817] [2023-12-20 09:54:53,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:54:53,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:54:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:54:55,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:54:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:54:55,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:54:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:54:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 381 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:54:55,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:54:55,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150130817] [2023-12-20 09:54:55,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150130817] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:54:55,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596888373] [2023-12-20 09:54:55,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 09:54:55,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:54:55,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:54:55,635 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:54:55,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-20 09:54:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:54:55,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 86 conjunts are in the unsatisfiable core [2023-12-20 09:54:55,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:54:55,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2023-12-20 09:54:56,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:56,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:56,038 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:54:56,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 67 [2023-12-20 09:54:56,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:56,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:56,155 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-12-20 09:54:56,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 91 treesize of output 103 [2023-12-20 09:54:56,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:56,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:56,312 INFO L349 Elim1Store]: treesize reduction 112, result has 24.8 percent of original size [2023-12-20 09:54:56,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 22 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 121 treesize of output 139 [2023-12-20 09:54:56,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:56,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:56,523 INFO L349 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2023-12-20 09:54:56,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 35 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 151 treesize of output 175 [2023-12-20 09:54:56,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:56,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:56,772 INFO L349 Elim1Store]: treesize reduction 224, result has 19.7 percent of original size [2023-12-20 09:54:56,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 50 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 51 case distinctions, treesize of input 181 treesize of output 211 [2023-12-20 09:54:56,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:56,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:56,997 INFO L349 Elim1Store]: treesize reduction 272, result has 16.8 percent of original size [2023-12-20 09:54:56,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 69 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 72 case distinctions, treesize of input 211 treesize of output 247 [2023-12-20 09:54:57,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:54:57,201 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:54:57,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 120 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 241 treesize of output 283 [2023-12-20 09:55:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 384 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 09:55:01,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:55:04,118 INFO L349 Elim1Store]: treesize reduction 708, result has 7.9 percent of original size [2023-12-20 09:55:04,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 136 case distinctions, treesize of input 301 treesize of output 205 [2023-12-20 09:55:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 381 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:55:04,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596888373] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:55:04,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:55:04,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32, 29] total 85 [2023-12-20 09:55:04,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859028952] [2023-12-20 09:55:04,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:55:04,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-12-20 09:55:04,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:55:04,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-12-20 09:55:04,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=806, Invalid=6334, Unknown=0, NotChecked=0, Total=7140 [2023-12-20 09:55:04,370 INFO L87 Difference]: Start difference. First operand 162 states and 178 transitions. Second operand has 85 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 84 states have internal predecessors, (181), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:55:31,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:55:31,751 INFO L93 Difference]: Finished difference Result 309 states and 325 transitions. [2023-12-20 09:55:31,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-12-20 09:55:31,751 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 84 states have internal predecessors, (181), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 70 [2023-12-20 09:55:31,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:55:31,752 INFO L225 Difference]: With dead ends: 309 [2023-12-20 09:55:31,752 INFO L226 Difference]: Without dead ends: 307 [2023-12-20 09:55:31,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10110 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=4719, Invalid=32723, Unknown=0, NotChecked=0, Total=37442 [2023-12-20 09:55:31,754 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 418 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 3509 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 3716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 3509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-12-20 09:55:31,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 582 Invalid, 3716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 3509 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-12-20 09:55:31,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-12-20 09:55:32,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 162. [2023-12-20 09:55:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 158 states have (on average 1.1012658227848102) internal successors, (174), 158 states have internal predecessors, (174), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:55:32,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 178 transitions. [2023-12-20 09:55:32,213 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 178 transitions. Word has length 70 [2023-12-20 09:55:32,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:55:32,213 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 178 transitions. [2023-12-20 09:55:32,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 84 states have internal predecessors, (181), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:55:32,214 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 178 transitions. [2023-12-20 09:55:32,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-20 09:55:32,214 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:55:32,214 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:55:32,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-20 09:55:32,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-20 09:55:32,421 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:55:32,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:55:32,421 INFO L85 PathProgramCache]: Analyzing trace with hash -600928601, now seen corresponding path program 26 times [2023-12-20 09:55:32,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:55:32,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686429511] [2023-12-20 09:55:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:55:32,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:55:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:55:33,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:55:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:55:33,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:55:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:55:33,842 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 1 proven. 395 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:55:33,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:55:33,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686429511] [2023-12-20 09:55:33,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686429511] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:55:33,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31119320] [2023-12-20 09:55:33,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 09:55:33,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:55:33,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:55:33,844 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:55:33,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-20 09:55:33,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 09:55:33,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:55:33,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 84 conjunts are in the unsatisfiable core [2023-12-20 09:55:34,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:55:34,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2023-12-20 09:55:34,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:55:34,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:55:34,764 INFO L349 Elim1Store]: treesize reduction 69, result has 21.6 percent of original size [2023-12-20 09:55:34,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 77 [2023-12-20 09:55:34,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:55:34,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:55:34,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:55:34,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:55:34,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:55:34,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:55:34,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:55:34,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:55:34,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:55:34,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:55:34,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:55:34,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:55:34,873 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:55:34,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 123 [2023-12-20 09:55:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 1 proven. 398 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 09:55:38,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:55:39,723 INFO L349 Elim1Store]: treesize reduction 156, result has 16.6 percent of original size [2023-12-20 09:55:39,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 129 treesize of output 94 [2023-12-20 09:55:41,629 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 3 proven. 393 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:55:41,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31119320] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:55:41,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:55:41,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 37, 34] total 100 [2023-12-20 09:55:41,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520403611] [2023-12-20 09:55:41,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:55:41,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-12-20 09:55:41,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:55:41,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-12-20 09:55:41,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=9447, Unknown=1, NotChecked=0, Total=9900 [2023-12-20 09:55:41,632 INFO L87 Difference]: Start difference. First operand 162 states and 178 transitions. Second operand has 100 states, 100 states have (on average 1.87) internal successors, (187), 99 states have internal predecessors, (187), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:56:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:56:17,206 INFO L93 Difference]: Finished difference Result 516 states and 532 transitions. [2023-12-20 09:56:17,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2023-12-20 09:56:17,208 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.87) internal successors, (187), 99 states have internal predecessors, (187), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 72 [2023-12-20 09:56:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:56:17,210 INFO L225 Difference]: With dead ends: 516 [2023-12-20 09:56:17,210 INFO L226 Difference]: Without dead ends: 514 [2023-12-20 09:56:17,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35441 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=5204, Invalid=102050, Unknown=2, NotChecked=0, Total=107256 [2023-12-20 09:56:17,215 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 2300 mSDsluCounter, 2584 mSDsCounter, 0 mSdLazyCounter, 7067 mSolverCounterSat, 1359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2300 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 8426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1359 IncrementalHoareTripleChecker+Valid, 7067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2023-12-20 09:56:17,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2300 Valid, 2646 Invalid, 8426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1359 Valid, 7067 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2023-12-20 09:56:17,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2023-12-20 09:56:17,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 120. [2023-12-20 09:56:17,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 116 states have (on average 1.1293103448275863) internal successors, (131), 116 states have internal predecessors, (131), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:56:17,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 135 transitions. [2023-12-20 09:56:17,558 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 135 transitions. Word has length 72 [2023-12-20 09:56:17,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:56:17,559 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 135 transitions. [2023-12-20 09:56:17,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.87) internal successors, (187), 99 states have internal predecessors, (187), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:56:17,559 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 135 transitions. [2023-12-20 09:56:17,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-20 09:56:17,559 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:56:17,560 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:56:17,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-20 09:56:17,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-20 09:56:17,767 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:56:17,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:56:17,767 INFO L85 PathProgramCache]: Analyzing trace with hash -274756656, now seen corresponding path program 27 times [2023-12-20 09:56:17,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:56:17,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071286904] [2023-12-20 09:56:17,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:56:17,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:56:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:56:18,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:56:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:56:18,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:56:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:56:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 346 proven. 82 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:56:18,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:56:18,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071286904] [2023-12-20 09:56:18,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071286904] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:56:18,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277540236] [2023-12-20 09:56:18,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 09:56:18,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:56:18,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:56:18,316 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:56:18,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-20 09:56:19,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2023-12-20 09:56:19,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:56:19,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-20 09:56:19,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:56:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 392 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:56:19,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:56:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 392 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:56:20,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277540236] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:56:20,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:56:20,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 48 [2023-12-20 09:56:20,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548476691] [2023-12-20 09:56:20,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:56:20,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-20 09:56:20,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:56:20,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-20 09:56:20,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1663, Unknown=0, NotChecked=0, Total=2256 [2023-12-20 09:56:20,032 INFO L87 Difference]: Start difference. First operand 120 states and 135 transitions. Second operand has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:56:21,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:56:21,656 INFO L93 Difference]: Finished difference Result 317 states and 332 transitions. [2023-12-20 09:56:21,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-12-20 09:56:21,656 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 73 [2023-12-20 09:56:21,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:56:21,657 INFO L225 Difference]: With dead ends: 317 [2023-12-20 09:56:21,657 INFO L226 Difference]: Without dead ends: 108 [2023-12-20 09:56:21,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 106 SyntacticMatches, 25 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1940, Invalid=7762, Unknown=0, NotChecked=0, Total=9702 [2023-12-20 09:56:21,659 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 162 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 09:56:21,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 278 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 09:56:21,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-12-20 09:56:21,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2023-12-20 09:56:21,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 77 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:56:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2023-12-20 09:56:21,899 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 73 [2023-12-20 09:56:21,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:56:21,899 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2023-12-20 09:56:21,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 48 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:56:21,899 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2023-12-20 09:56:21,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-20 09:56:21,900 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:56:21,900 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:56:21,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-20 09:56:22,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:56:22,100 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:56:22,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:56:22,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1841096491, now seen corresponding path program 28 times [2023-12-20 09:56:22,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:56:22,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953647838] [2023-12-20 09:56:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:56:22,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:56:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:56:23,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:56:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:56:23,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:56:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:56:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 437 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:56:23,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:56:23,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953647838] [2023-12-20 09:56:23,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953647838] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:56:23,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521563358] [2023-12-20 09:56:23,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 09:56:23,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:56:23,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:56:23,812 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:56:23,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-20 09:56:24,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 09:56:24,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:56:24,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 85 conjunts are in the unsatisfiable core [2023-12-20 09:56:24,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:56:24,473 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 46 treesize of output 47 [2023-12-20 09:56:24,532 INFO L349 Elim1Store]: treesize reduction 73, result has 27.7 percent of original size [2023-12-20 09:56:24,532 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 95 treesize of output 101 [2023-12-20 09:56:24,611 INFO L349 Elim1Store]: treesize reduction 93, result has 23.1 percent of original size [2023-12-20 09:56:24,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 143 treesize of output 155 [2023-12-20 09:56:24,731 INFO L349 Elim1Store]: treesize reduction 186, result has 22.8 percent of original size [2023-12-20 09:56:24,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 191 treesize of output 209 [2023-12-20 09:56:24,879 INFO L349 Elim1Store]: treesize reduction 226, result has 19.6 percent of original size [2023-12-20 09:56:24,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 239 treesize of output 263 [2023-12-20 09:56:25,084 INFO L349 Elim1Store]: treesize reduction 339, result has 19.5 percent of original size [2023-12-20 09:56:25,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 51 case distinctions, treesize of input 287 treesize of output 317 [2023-12-20 09:56:25,386 INFO L349 Elim1Store]: treesize reduction 399, result has 17.0 percent of original size [2023-12-20 09:56:25,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 72 case distinctions, treesize of input 335 treesize of output 371 [2023-12-20 09:56:25,700 INFO L349 Elim1Store]: treesize reduction 523, result has 17.1 percent of original size [2023-12-20 09:56:25,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 99 case distinctions, treesize of input 381 treesize of output 423 [2023-12-20 09:56:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 437 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:56:33,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:56:36,440 INFO L349 Elim1Store]: treesize reduction 80, result has 38.0 percent of original size [2023-12-20 09:56:36,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 136 case distinctions, treesize of input 285 treesize of output 185 [2023-12-20 09:56:36,613 WARN L667 sPolynomialRelations]: Constructing 65536(two to the power of 16 dual juncts. [2023-12-20 09:56:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 437 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:56:39,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521563358] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:56:39,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:56:39,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 90 [2023-12-20 09:56:39,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692858193] [2023-12-20 09:56:39,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:56:39,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-12-20 09:56:39,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:56:39,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-12-20 09:56:39,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=918, Invalid=7092, Unknown=0, NotChecked=0, Total=8010 [2023-12-20 09:56:39,089 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 90 states, 90 states have (on average 2.111111111111111) internal successors, (190), 90 states have internal predecessors, (190), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:57:17,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:57:17,779 INFO L93 Difference]: Finished difference Result 299 states and 329 transitions. [2023-12-20 09:57:17,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2023-12-20 09:57:17,780 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.111111111111111) internal successors, (190), 90 states have internal predecessors, (190), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 74 [2023-12-20 09:57:17,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:57:17,781 INFO L225 Difference]: With dead ends: 299 [2023-12-20 09:57:17,781 INFO L226 Difference]: Without dead ends: 297 [2023-12-20 09:57:17,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11712 ImplicationChecksByTransitivity, 40.0s TimeCoverageRelationStatistics Valid=8456, Invalid=42846, Unknown=0, NotChecked=0, Total=51302 [2023-12-20 09:57:17,783 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 641 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 3025 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 3269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 3025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-12-20 09:57:17,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 718 Invalid, 3269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 3025 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-12-20 09:57:17,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-12-20 09:57:18,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 188. [2023-12-20 09:57:18,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.0869565217391304) internal successors, (200), 184 states have internal predecessors, (200), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:57:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 204 transitions. [2023-12-20 09:57:18,412 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 204 transitions. Word has length 74 [2023-12-20 09:57:18,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:57:18,413 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 204 transitions. [2023-12-20 09:57:18,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.111111111111111) internal successors, (190), 90 states have internal predecessors, (190), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:57:18,413 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 204 transitions. [2023-12-20 09:57:18,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-20 09:57:18,414 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:57:18,414 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:57:18,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-20 09:57:18,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:57:18,615 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:57:18,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:57:18,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1378411948, now seen corresponding path program 29 times [2023-12-20 09:57:18,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:57:18,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129510306] [2023-12-20 09:57:18,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:57:18,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:57:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:57:20,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:57:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:57:20,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:57:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:57:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:57:20,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:57:20,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129510306] [2023-12-20 09:57:20,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129510306] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:57:20,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302958151] [2023-12-20 09:57:20,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 09:57:20,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:57:20,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:57:20,531 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:57:20,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-20 09:57:21,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2023-12-20 09:57:21,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:57:21,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 121 conjunts are in the unsatisfiable core [2023-12-20 09:57:21,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:57:21,106 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 30 treesize of output 31 [2023-12-20 09:57:21,176 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-12-20 09:57:21,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 67 [2023-12-20 09:57:21,290 INFO L349 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2023-12-20 09:57:21,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 91 treesize of output 103 [2023-12-20 09:57:21,425 INFO L349 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2023-12-20 09:57:21,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 121 treesize of output 139 [2023-12-20 09:57:21,564 INFO L349 Elim1Store]: treesize reduction 160, result has 18.8 percent of original size [2023-12-20 09:57:21,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 151 treesize of output 175 [2023-12-20 09:57:21,743 INFO L349 Elim1Store]: treesize reduction 240, result has 18.6 percent of original size [2023-12-20 09:57:21,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 51 case distinctions, treesize of input 181 treesize of output 211 [2023-12-20 09:57:21,944 INFO L349 Elim1Store]: treesize reduction 288, result has 16.0 percent of original size [2023-12-20 09:57:21,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 72 case distinctions, treesize of input 211 treesize of output 247 [2023-12-20 09:57:22,208 INFO L349 Elim1Store]: treesize reduction 384, result has 16.0 percent of original size [2023-12-20 09:57:22,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 28 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 99 case distinctions, treesize of input 241 treesize of output 283 [2023-12-20 09:57:22,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:57:22,412 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:57:22,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 153 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 271 treesize of output 319 [2023-12-20 09:57:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:57:28,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:57:32,651 INFO L349 Elim1Store]: treesize reduction 594, result has 8.5 percent of original size [2023-12-20 09:57:32,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 22 select indices, 22 select index equivalence classes, 0 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 231 case distinctions, treesize of input 1276 treesize of output 664 [2023-12-20 09:57:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 487 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:57:32,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302958151] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:57:32,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:57:32,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 36, 39] total 101 [2023-12-20 09:57:32,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690548145] [2023-12-20 09:57:32,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:57:32,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-12-20 09:57:32,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:57:32,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-12-20 09:57:32,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1137, Invalid=8963, Unknown=0, NotChecked=0, Total=10100 [2023-12-20 09:57:32,812 INFO L87 Difference]: Start difference. First operand 188 states and 204 transitions. Second operand has 101 states, 101 states have (on average 1.9603960396039604) internal successors, (198), 101 states have internal predecessors, (198), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:57:46,535 WARN L293 SmtUtils]: Spent 8.87s on a formula simplification. DAG size of input: 317 DAG size of output: 283 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 09:57:58,764 WARN L293 SmtUtils]: Spent 10.77s on a formula simplification that was a NOOP. DAG size: 293 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 09:58:10,008 WARN L293 SmtUtils]: Spent 10.58s on a formula simplification that was a NOOP. DAG size: 292 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 09:58:33,234 WARN L293 SmtUtils]: Spent 10.83s on a formula simplification that was a NOOP. DAG size: 280 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 09:58:45,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:58:45,786 INFO L93 Difference]: Finished difference Result 357 states and 372 transitions. [2023-12-20 09:58:45,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2023-12-20 09:58:45,786 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.9603960396039604) internal successors, (198), 101 states have internal predecessors, (198), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 77 [2023-12-20 09:58:45,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:58:45,787 INFO L225 Difference]: With dead ends: 357 [2023-12-20 09:58:45,787 INFO L226 Difference]: Without dead ends: 355 [2023-12-20 09:58:45,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15260 ImplicationChecksByTransitivity, 73.5s TimeCoverageRelationStatistics Valid=6367, Invalid=45389, Unknown=0, NotChecked=0, Total=51756 [2023-12-20 09:58:45,790 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 573 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 4096 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 4357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 4096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-12-20 09:58:45,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [573 Valid, 1071 Invalid, 4357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 4096 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-12-20 09:58:45,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-12-20 09:58:46,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 186. [2023-12-20 09:58:46,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 182 states have (on average 1.0824175824175823) internal successors, (197), 182 states have internal predecessors, (197), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:58:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 201 transitions. [2023-12-20 09:58:46,473 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 201 transitions. Word has length 77 [2023-12-20 09:58:46,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:58:46,473 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 201 transitions. [2023-12-20 09:58:46,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.9603960396039604) internal successors, (198), 101 states have internal predecessors, (198), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-20 09:58:46,473 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 201 transitions. [2023-12-20 09:58:46,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-20 09:58:46,474 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:58:46,474 INFO L195 NwaCegarLoop]: trace histogram [18, 15, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:58:46,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-20 09:58:46,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-20 09:58:46,682 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:58:46,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:58:46,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1421365264, now seen corresponding path program 30 times [2023-12-20 09:58:46,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:58:46,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542990606] [2023-12-20 09:58:46,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:58:46,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:58:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:58:48,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:58:48,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:58:48,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:58:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:58:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 2 proven. 470 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:58:48,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:58:48,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542990606] [2023-12-20 09:58:48,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542990606] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:58:48,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790433296] [2023-12-20 09:58:48,141 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 09:58:48,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:58:48,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:58:48,146 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:58:48,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-20 09:58:57,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2023-12-20 09:58:57,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 09:58:57,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 94 conjunts are in the unsatisfiable core [2023-12-20 09:58:57,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:58:58,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2023-12-20 09:58:58,158 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-12-20 09:58:58,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 67 [2023-12-20 09:58:58,256 INFO L349 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2023-12-20 09:58:58,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 91 treesize of output 103 [2023-12-20 09:58:58,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:58:58,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:58:58,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:58:58,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:58:58,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:58:58,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:58:58,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:58:58,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:58:58,352 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:58:58,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 28 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 121 treesize of output 139 [2023-12-20 09:59:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 0 proven. 475 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 09:59:00,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:59:02,309 INFO L349 Elim1Store]: treesize reduction 120, result has 25.5 percent of original size [2023-12-20 09:59:02,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 173 treesize of output 125 [2023-12-20 09:59:03,965 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 6 proven. 466 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:59:03,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790433296] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:59:03,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:59:03,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 40, 37] total 109 [2023-12-20 09:59:03,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221892630] [2023-12-20 09:59:03,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:59:03,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2023-12-20 09:59:03,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:59:03,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2023-12-20 09:59:03,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=11046, Unknown=0, NotChecked=0, Total=11772 [2023-12-20 09:59:03,968 INFO L87 Difference]: Start difference. First operand 186 states and 201 transitions. Second operand has 109 states, 109 states have (on average 1.853211009174312) internal successors, (202), 108 states have internal predecessors, (202), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:59:24,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 09:59:24,039 INFO L93 Difference]: Finished difference Result 423 states and 441 transitions. [2023-12-20 09:59:24,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2023-12-20 09:59:24,039 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.853211009174312) internal successors, (202), 108 states have internal predecessors, (202), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 77 [2023-12-20 09:59:24,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 09:59:24,041 INFO L225 Difference]: With dead ends: 423 [2023-12-20 09:59:24,041 INFO L226 Difference]: Without dead ends: 421 [2023-12-20 09:59:24,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23366 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=4321, Invalid=73799, Unknown=0, NotChecked=0, Total=78120 [2023-12-20 09:59:24,045 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 1336 mSDsluCounter, 2703 mSDsCounter, 0 mSdLazyCounter, 7361 mSolverCounterSat, 791 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1336 SdHoareTripleChecker+Valid, 2768 SdHoareTripleChecker+Invalid, 8152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 791 IncrementalHoareTripleChecker+Valid, 7361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-20 09:59:24,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1336 Valid, 2768 Invalid, 8152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [791 Valid, 7361 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-12-20 09:59:24,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2023-12-20 09:59:24,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 127. [2023-12-20 09:59:24,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 123 states have (on average 1.024390243902439) internal successors, (126), 123 states have internal predecessors, (126), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 09:59:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2023-12-20 09:59:24,629 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 77 [2023-12-20 09:59:24,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 09:59:24,629 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2023-12-20 09:59:24,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.853211009174312) internal successors, (202), 108 states have internal predecessors, (202), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 09:59:24,629 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2023-12-20 09:59:24,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-20 09:59:24,630 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 09:59:24,630 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 09:59:24,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-20 09:59:24,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:59:24,830 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 09:59:24,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 09:59:24,831 INFO L85 PathProgramCache]: Analyzing trace with hash -724565040, now seen corresponding path program 31 times [2023-12-20 09:59:24,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 09:59:24,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319382002] [2023-12-20 09:59:24,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 09:59:24,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 09:59:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:59:27,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 09:59:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:59:27,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 09:59:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:59:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 0 proven. 550 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:59:27,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 09:59:27,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319382002] [2023-12-20 09:59:27,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319382002] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 09:59:27,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551004645] [2023-12-20 09:59:27,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 09:59:27,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 09:59:27,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 09:59:27,221 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 09:59:27,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-20 09:59:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 09:59:27,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 134 conjunts are in the unsatisfiable core [2023-12-20 09:59:27,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 09:59:27,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2023-12-20 09:59:27,692 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-12-20 09:59:27,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 67 [2023-12-20 09:59:27,783 INFO L349 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2023-12-20 09:59:27,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 11 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 91 treesize of output 103 [2023-12-20 09:59:27,906 INFO L349 Elim1Store]: treesize reduction 128, result has 22.4 percent of original size [2023-12-20 09:59:27,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 121 treesize of output 139 [2023-12-20 09:59:28,060 INFO L349 Elim1Store]: treesize reduction 160, result has 18.8 percent of original size [2023-12-20 09:59:28,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 33 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 151 treesize of output 175 [2023-12-20 09:59:28,248 INFO L349 Elim1Store]: treesize reduction 240, result has 18.6 percent of original size [2023-12-20 09:59:28,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 48 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 51 case distinctions, treesize of input 181 treesize of output 211 [2023-12-20 09:59:28,506 INFO L349 Elim1Store]: treesize reduction 288, result has 16.0 percent of original size [2023-12-20 09:59:28,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 67 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 72 case distinctions, treesize of input 211 treesize of output 247 [2023-12-20 09:59:28,796 INFO L349 Elim1Store]: treesize reduction 384, result has 16.0 percent of original size [2023-12-20 09:59:28,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 88 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 99 case distinctions, treesize of input 241 treesize of output 283 [2023-12-20 09:59:28,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:28,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 09:59:29,017 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 09:59:29,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 153 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 271 treesize of output 319 [2023-12-20 09:59:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 0 proven. 553 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 09:59:35,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 09:59:42,992 INFO L349 Elim1Store]: treesize reduction 1270, result has 4.7 percent of original size [2023-12-20 09:59:42,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 23 select indices, 23 select index equivalence classes, 0 disjoint index pairs (out of 253 index pairs), introduced 23 new quantified variables, introduced 253 case distinctions, treesize of input 1650 treesize of output 852 [2023-12-20 09:59:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 0 proven. 550 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 09:59:43,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551004645] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 09:59:43,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 09:59:43,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 41, 42] total 112 [2023-12-20 09:59:43,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620091374] [2023-12-20 09:59:43,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 09:59:43,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2023-12-20 09:59:43,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 09:59:43,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2023-12-20 09:59:43,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1345, Invalid=11087, Unknown=0, NotChecked=0, Total=12432 [2023-12-20 09:59:43,480 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 112 states, 112 states have (on average 1.9107142857142858) internal successors, (214), 111 states have internal predecessors, (214), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 10:00:11,718 WARN L293 SmtUtils]: Spent 12.28s on a formula simplification. DAG size of input: 366 DAG size of output: 329 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 10:00:26,522 WARN L293 SmtUtils]: Spent 12.61s on a formula simplification. DAG size of input: 359 DAG size of output: 327 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 10:00:41,502 WARN L293 SmtUtils]: Spent 13.75s on a formula simplification that was a NOOP. DAG size: 327 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 10:00:56,230 WARN L293 SmtUtils]: Spent 14.16s on a formula simplification that was a NOOP. DAG size: 374 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 10:01:02,805 WARN L293 SmtUtils]: Spent 5.15s on a formula simplification that was a NOOP. DAG size: 279 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 10:01:09,546 WARN L293 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 346 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 10:01:22,133 WARN L293 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 350 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 10:01:44,055 WARN L293 SmtUtils]: Spent 15.35s on a formula simplification that was a NOOP. DAG size: 359 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 10:02:05,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:02:05,763 INFO L93 Difference]: Finished difference Result 336 states and 353 transitions. [2023-12-20 10:02:05,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2023-12-20 10:02:05,763 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.9107142857142858) internal successors, (214), 111 states have internal predecessors, (214), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 81 [2023-12-20 10:02:05,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:02:05,764 INFO L225 Difference]: With dead ends: 336 [2023-12-20 10:02:05,764 INFO L226 Difference]: Without dead ends: 334 [2023-12-20 10:02:05,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23571 ImplicationChecksByTransitivity, 141.4s TimeCoverageRelationStatistics Valid=8659, Invalid=69461, Unknown=0, NotChecked=0, Total=78120 [2023-12-20 10:02:05,769 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 581 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 5359 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 5624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 5359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2023-12-20 10:02:05,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 947 Invalid, 5624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 5359 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2023-12-20 10:02:05,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-12-20 10:02:06,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 140. [2023-12-20 10:02:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 136 states have (on average 1.1102941176470589) internal successors, (151), 136 states have internal predecessors, (151), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-20 10:02:06,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 155 transitions. [2023-12-20 10:02:06,545 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 155 transitions. Word has length 81 [2023-12-20 10:02:06,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:02:06,545 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 155 transitions. [2023-12-20 10:02:06,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.9107142857142858) internal successors, (214), 111 states have internal predecessors, (214), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 10:02:06,546 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 155 transitions. [2023-12-20 10:02:06,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-20 10:02:06,546 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:02:06,546 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:02:06,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-20 10:02:06,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:02:06,747 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:02:06,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:02:06,747 INFO L85 PathProgramCache]: Analyzing trace with hash 993741543, now seen corresponding path program 32 times [2023-12-20 10:02:06,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:02:06,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626282023] [2023-12-20 10:02:06,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:02:06,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:02:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:02:08,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-20 10:02:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:02:08,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-12-20 10:02:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:02:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 606 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 10:02:08,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:02:08,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626282023] [2023-12-20 10:02:08,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626282023] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:02:08,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489474194] [2023-12-20 10:02:08,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 10:02:08,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:02:08,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:02:08,996 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:02:08,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-20 10:02:09,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 10:02:09,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:02:09,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 112 conjunts are in the unsatisfiable core [2023-12-20 10:02:09,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:02:09,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 31 [2023-12-20 10:02:09,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:09,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:09,399 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:02:09,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 67 [2023-12-20 10:02:09,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:09,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:09,493 INFO L349 Elim1Store]: treesize reduction 48, result has 28.4 percent of original size [2023-12-20 10:02:09,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 91 treesize of output 103 [2023-12-20 10:02:09,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:09,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:09,617 INFO L349 Elim1Store]: treesize reduction 112, result has 24.8 percent of original size [2023-12-20 10:02:09,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 22 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 121 treesize of output 139 [2023-12-20 10:02:09,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:09,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:09,761 INFO L349 Elim1Store]: treesize reduction 144, result has 20.4 percent of original size [2023-12-20 10:02:09,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 35 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 151 treesize of output 175 [2023-12-20 10:02:09,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:09,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:09,956 INFO L349 Elim1Store]: treesize reduction 224, result has 19.7 percent of original size [2023-12-20 10:02:09,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 50 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 51 case distinctions, treesize of input 181 treesize of output 211 [2023-12-20 10:02:10,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:10,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:10,179 INFO L349 Elim1Store]: treesize reduction 272, result has 16.8 percent of original size [2023-12-20 10:02:10,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 69 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 72 case distinctions, treesize of input 211 treesize of output 247 [2023-12-20 10:02:10,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:10,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:10,473 INFO L349 Elim1Store]: treesize reduction 368, result has 16.6 percent of original size [2023-12-20 10:02:10,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 90 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 99 case distinctions, treesize of input 241 treesize of output 283 [2023-12-20 10:02:10,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:10,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:10,839 INFO L349 Elim1Store]: treesize reduction 432, result has 14.5 percent of original size [2023-12-20 10:02:10,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 115 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 128 case distinctions, treesize of input 271 treesize of output 319 [2023-12-20 10:02:11,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:02:11,104 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:02:11,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 190 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 301 treesize of output 355 [2023-12-20 10:02:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 609 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:02:18,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:02:23,420 INFO L349 Elim1Store]: treesize reduction 620, result has 9.5 percent of original size [2023-12-20 10:02:23,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 22 select indices, 22 select index equivalence classes, 0 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 231 case distinctions, treesize of input 716 treesize of output 406 [2023-12-20 10:02:23,662 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 606 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 10:02:23,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489474194] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:02:23,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:02:23,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 39, 37] total 106 [2023-12-20 10:02:23,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051501707] [2023-12-20 10:02:23,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:02:23,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2023-12-20 10:02:23,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:02:23,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2023-12-20 10:02:23,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=9529, Unknown=0, NotChecked=0, Total=11130 [2023-12-20 10:02:23,665 INFO L87 Difference]: Start difference. First operand 140 states and 155 transitions. Second operand has 106 states, 106 states have (on average 2.1037735849056602) internal successors, (223), 105 states have internal predecessors, (223), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-20 10:02:38,378 WARN L293 SmtUtils]: Spent 8.59s on a formula simplification. DAG size of input: 304 DAG size of output: 280 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 10:02:45,065 WARN L293 SmtUtils]: Spent 5.53s on a formula simplification that was a NOOP. DAG size: 260 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 10:02:51,127 WARN L293 SmtUtils]: Spent 5.58s on a formula simplification that was a NOOP. DAG size: 299 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 10:03:09,244 WARN L293 SmtUtils]: Spent 5.63s on a formula simplification that was a NOOP. DAG size: 312 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 10:03:29,754 WARN L293 SmtUtils]: Spent 5.80s on a formula simplification that was a NOOP. DAG size: 316 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 10:04:07,114 WARN L293 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 293 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 10:04:17,351 WARN L293 SmtUtils]: Spent 5.75s on a formula simplification that was a NOOP. DAG size: 300 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-20 10:04:28,123 WARN L293 SmtUtils]: Spent 5.99s on a formula simplification that was a NOOP. DAG size: 304 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-12-20 10:04:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-12-20 10:04:47,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12067 ImplicationChecksByTransitivity, 145.1s TimeCoverageRelationStatistics Valid=7007, Invalid=36049, Unknown=0, NotChecked=0, Total=43056 [2023-12-20 10:04:47,996 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 499 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 2704 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 2974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 2704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:04:47,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 560 Invalid, 2974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 2704 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2023-12-20 10:04:47,997 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 10:04:48,006 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 10:04:48,006 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 10:04:48,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-20 10:04:48,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-20 10:04:48,198 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (140states) and FLOYD_HOARE automaton (currently 128 states, 106 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 208 known predicates. [2023-12-20 10:04:48,202 INFO L445 BasicCegarLoop]: Path program histogram: [32, 1, 1, 1] [2023-12-20 10:04:48,204 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 10:04:48,205 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 10:04:48 BoogieIcfgContainer [2023-12-20 10:04:48,205 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 10:04:48,206 INFO L158 Benchmark]: Toolchain (without parser) took 835923.00ms. Allocated memory was 183.5MB in the beginning and 857.7MB in the end (delta: 674.2MB). Free memory was 128.1MB in the beginning and 433.4MB in the end (delta: -305.3MB). Peak memory consumption was 369.4MB. Max. memory is 8.0GB. [2023-12-20 10:04:48,206 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 183.5MB. Free memory is still 136.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 10:04:48,206 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.84ms. Allocated memory is still 183.5MB. Free memory was 127.7MB in the beginning and 117.1MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-20 10:04:48,206 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.90ms. Allocated memory is still 183.5MB. Free memory was 117.1MB in the beginning and 115.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-20 10:04:48,206 INFO L158 Benchmark]: Boogie Preprocessor took 39.59ms. Allocated memory is still 183.5MB. Free memory was 115.1MB in the beginning and 113.5MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-20 10:04:48,206 INFO L158 Benchmark]: RCFGBuilder took 336.33ms. Allocated memory is still 183.5MB. Free memory was 113.5MB in the beginning and 100.4MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-20 10:04:48,206 INFO L158 Benchmark]: TraceAbstraction took 835309.39ms. Allocated memory was 183.5MB in the beginning and 857.7MB in the end (delta: 674.2MB). Free memory was 99.8MB in the beginning and 433.4MB in the end (delta: -333.6MB). Peak memory consumption was 341.1MB. Max. memory is 8.0GB. [2023-12-20 10:04:48,207 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 183.5MB. Free memory is still 136.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 203.84ms. Allocated memory is still 183.5MB. Free memory was 127.7MB in the beginning and 117.1MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.90ms. Allocated memory is still 183.5MB. Free memory was 117.1MB in the beginning and 115.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.59ms. Allocated memory is still 183.5MB. Free memory was 115.1MB in the beginning and 113.5MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 336.33ms. Allocated memory is still 183.5MB. Free memory was 113.5MB in the beginning and 100.4MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 835309.39ms. Allocated memory was 183.5MB in the beginning and 857.7MB in the end (delta: 674.2MB). Free memory was 99.8MB in the beginning and 433.4MB in the end (delta: -333.6MB). Peak memory consumption was 341.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 8]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 8). Cancelled while NwaCegarLoop was constructing difference of abstraction (140states) and FLOYD_HOARE automaton (currently 128 states, 106 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 208 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 835.3s, OverallIterations: 35, TraceHistogramMax: 20, PathProgramHistogramMax: 32, EmptinessCheckTime: 0.0s, AutomataDifference: 628.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 mSolverCounterUnknown, 11992 SdHoareTripleChecker+Valid, 72.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11992 mSDsluCounter, 20871 SdHoareTripleChecker+Invalid, 67.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 20150 mSDsCounter, 6121 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 65254 IncrementalHoareTripleChecker+Invalid, 71386 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6121 mSolverCounterUnsat, 721 mSDtfsCounter, 65254 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6517 GetRequests, 2169 SyntacticMatches, 50 SemanticMatches, 4297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229600 ImplicationChecksByTransitivity, 635.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=188occurred in iteration=31, InterpolantAutomatonStates: 2774, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.6s AutomataMinimizationTime, 34 MinimizatonAttempts, 3224 StatesRemovedByMinimization, 33 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 15.8s SatisfiabilityAnalysisTime, 174.0s InterpolantComputationTime, 3320 NumberOfCodeBlocks, 3320 NumberOfCodeBlocksAsserted, 211 NumberOfCheckSat, 4862 ConstructedInterpolants, 261 QuantifiedInterpolants, 245012 SizeOfPredicates, 576 NumberOfNonLiveVariables, 8073 ConjunctsInSsa, 1933 ConjunctsInUnsatCore, 101 InterpolantComputations, 2 PerfectInterpolantSequences, 1970/19823 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown