/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 true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-fpi/ms1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 21:16:28,881 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 21:16:28,930 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 21:16:28,934 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 21:16:28,934 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 21:16:28,949 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 21:16:28,950 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 21:16:28,950 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 21:16:28,951 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 21:16:28,951 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 21:16:28,951 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 21:16:28,951 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 21:16:28,952 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 21:16:28,952 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 21:16:28,952 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 21:16:28,953 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 21:16:28,953 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 21:16:28,953 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 21:16:28,954 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 21:16:28,954 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 21:16:28,954 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 21:16:28,955 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 21:16:28,955 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 21:16:28,955 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 21:16:28,955 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 21:16:28,956 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 21:16:28,956 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 21:16:28,956 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 21:16:28,956 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 21:16:28,956 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 21:16:28,957 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 21:16:28,957 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 21:16:28,957 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 21:16:28,957 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 21:16:28,957 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 21:16:28,958 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 21:16:28,958 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 21:16:28,958 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 21:16:28,958 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 21:16:28,958 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 21:16:28,958 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 21:16:28,968 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 21:16:28,968 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 21:16:28,968 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 21:16:29,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 21:16:29,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 21:16:29,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 21:16:29,211 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 21:16:29,211 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 21:16:29,213 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms1.c [2023-12-18 21:16:30,278 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 21:16:30,407 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 21:16:30,407 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ms1.c [2023-12-18 21:16:30,412 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d876a3df/3388e9ffe36748899c56ab0c692b7a03/FLAG344818c92 [2023-12-18 21:16:30,425 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d876a3df/3388e9ffe36748899c56ab0c692b7a03 [2023-12-18 21:16:30,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 21:16:30,428 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 21:16:30,430 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 21:16:30,430 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 21:16:30,438 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 21:16:30,439 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:16:30" (1/1) ... [2023-12-18 21:16:30,440 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18b6622b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:16:30, skipping insertion in model container [2023-12-18 21:16:30,440 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:16:30" (1/1) ... [2023-12-18 21:16:30,453 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 21:16:30,570 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-fpi/ms1.c[586,599] [2023-12-18 21:16:30,582 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 21:16:30,588 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 21:16:30,596 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-fpi/ms1.c[586,599] [2023-12-18 21:16:30,600 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 21:16:30,609 INFO L206 MainTranslator]: Completed translation [2023-12-18 21:16:30,610 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:16:30 WrapperNode [2023-12-18 21:16:30,610 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 21:16:30,611 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 21:16:30,611 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 21:16:30,611 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 21:16:30,615 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:16:30" (1/1) ... [2023-12-18 21:16:30,621 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:16:30" (1/1) ... [2023-12-18 21:16:30,636 INFO L138 Inliner]: procedures = 17, calls = 25, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2023-12-18 21:16:30,637 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 21:16:30,637 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 21:16:30,637 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 21:16:30,637 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 21:16:30,644 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:16:30" (1/1) ... [2023-12-18 21:16:30,644 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:16:30" (1/1) ... [2023-12-18 21:16:30,645 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:16:30" (1/1) ... [2023-12-18 21:16:30,653 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 6, 4, 2]. 43 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [2, 6, 0, 0]. The 3 writes are split as follows [0, 0, 2, 1]. [2023-12-18 21:16:30,654 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:16:30" (1/1) ... [2023-12-18 21:16:30,654 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:16:30" (1/1) ... [2023-12-18 21:16:30,657 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:16:30" (1/1) ... [2023-12-18 21:16:30,659 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:16:30" (1/1) ... [2023-12-18 21:16:30,660 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:16:30" (1/1) ... [2023-12-18 21:16:30,661 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:16:30" (1/1) ... [2023-12-18 21:16:30,662 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 21:16:30,663 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 21:16:30,663 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 21:16:30,663 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 21:16:30,663 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:16:30" (1/1) ... [2023-12-18 21:16:30,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 21:16:30,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:16:30,701 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) [2023-12-18 21:16:30,711 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 [2023-12-18 21:16:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 21:16:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 21:16:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 21:16:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 21:16:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-18 21:16:30,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 21:16:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 21:16:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 21:16:30,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 21:16:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-18 21:16:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-18 21:16:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 21:16:30,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 21:16:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 21:16:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 21:16:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 21:16:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-18 21:16:30,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 21:16:30,817 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 21:16:30,819 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 21:16:30,965 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 21:16:30,979 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 21:16:30,979 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-18 21:16:30,980 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:16:30 BoogieIcfgContainer [2023-12-18 21:16:30,980 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 21:16:30,981 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 21:16:30,981 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 21:16:30,983 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 21:16:30,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:16:30" (1/3) ... [2023-12-18 21:16:30,984 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d301ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:16:30, skipping insertion in model container [2023-12-18 21:16:30,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:16:30" (2/3) ... [2023-12-18 21:16:30,985 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d301ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:16:30, skipping insertion in model container [2023-12-18 21:16:30,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:16:30" (3/3) ... [2023-12-18 21:16:30,985 INFO L112 eAbstractionObserver]: Analyzing ICFG ms1.c [2023-12-18 21:16:30,997 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 21:16:30,997 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 21:16:31,026 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 21:16:31,031 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;@428e9432, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 21:16:31,031 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 21:16:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:31,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-18 21:16:31,038 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:16:31,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:16:31,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:16:31,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:16:31,042 INFO L85 PathProgramCache]: Analyzing trace with hash -475281051, now seen corresponding path program 1 times [2023-12-18 21:16:31,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:16:31,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590271009] [2023-12-18 21:16:31,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:16:31,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:16:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:16:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:31,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:16:31,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590271009] [2023-12-18 21:16:31,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590271009] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:16:31,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:16:31,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 21:16:31,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066533089] [2023-12-18 21:16:31,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:16:31,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 21:16:31,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:16:31,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 21:16:31,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 21:16:31,213 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:31,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:16:31,242 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2023-12-18 21:16:31,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 21:16:31,244 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-18 21:16:31,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:16:31,259 INFO L225 Difference]: With dead ends: 29 [2023-12-18 21:16:31,259 INFO L226 Difference]: Without dead ends: 13 [2023-12-18 21:16:31,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 21:16:31,272 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:16:31,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:16:31,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-18 21:16:31,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-12-18 21:16:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:31,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-12-18 21:16:31,297 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2023-12-18 21:16:31,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:16:31,297 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-12-18 21:16:31,297 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:31,298 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-12-18 21:16:31,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-18 21:16:31,298 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:16:31,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:16:31,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 21:16:31,299 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:16:31,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:16:31,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1284627677, now seen corresponding path program 1 times [2023-12-18 21:16:31,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:16:31,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263216629] [2023-12-18 21:16:31,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:16:31,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:16:31,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:16:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:31,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:16:31,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263216629] [2023-12-18 21:16:31,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263216629] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:16:31,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:16:31,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 21:16:31,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605676456] [2023-12-18 21:16:31,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:16:31,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 21:16:31,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:16:31,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 21:16:31,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 21:16:31,441 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:31,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:16:31,480 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2023-12-18 21:16:31,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 21:16:31,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-18 21:16:31,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:16:31,481 INFO L225 Difference]: With dead ends: 25 [2023-12-18 21:16:31,482 INFO L226 Difference]: Without dead ends: 17 [2023-12-18 21:16:31,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 21:16:31,483 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:16:31,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 11 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:16:31,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-18 21:16:31,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2023-12-18 21:16:31,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-12-18 21:16:31,494 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2023-12-18 21:16:31,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:16:31,494 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-12-18 21:16:31,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:31,494 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-12-18 21:16:31,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-18 21:16:31,495 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:16:31,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:16:31,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 21:16:31,496 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:16:31,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:16:31,497 INFO L85 PathProgramCache]: Analyzing trace with hash -254677122, now seen corresponding path program 1 times [2023-12-18 21:16:31,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:16:31,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308712773] [2023-12-18 21:16:31,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:16:31,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:16:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:16:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:16:31,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:16:31,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308712773] [2023-12-18 21:16:31,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308712773] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:16:31,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:16:31,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 21:16:31,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520991975] [2023-12-18 21:16:31,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:16:31,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 21:16:31,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:16:31,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 21:16:31,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-18 21:16:31,665 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:31,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:16:31,697 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2023-12-18 21:16:31,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 21:16:31,699 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-18 21:16:31,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:16:31,701 INFO L225 Difference]: With dead ends: 23 [2023-12-18 21:16:31,701 INFO L226 Difference]: Without dead ends: 19 [2023-12-18 21:16:31,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-18 21:16:31,702 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:16:31,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:16:31,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-18 21:16:31,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2023-12-18 21:16:31,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:31,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-12-18 21:16:31,705 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2023-12-18 21:16:31,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:16:31,706 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-12-18 21:16:31,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:31,706 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-12-18 21:16:31,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-18 21:16:31,706 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:16:31,706 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:16:31,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-18 21:16:31,707 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:16:31,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:16:31,710 INFO L85 PathProgramCache]: Analyzing trace with hash -577618426, now seen corresponding path program 1 times [2023-12-18 21:16:31,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:16:31,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290883983] [2023-12-18 21:16:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:16:31,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:16:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:16:31,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:31,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:16:31,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290883983] [2023-12-18 21:16:31,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290883983] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:16:31,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689608831] [2023-12-18 21:16:31,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:16:31,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:16:31,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:16:31,827 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) [2023-12-18 21:16:31,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 21:16:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:16:31,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 21:16:31,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:16:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:31,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:16:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:32,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689608831] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:16:32,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:16:32,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-12-18 21:16:32,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446097373] [2023-12-18 21:16:32,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:16:32,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 21:16:32,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:16:32,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 21:16:32,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-18 21:16:32,043 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:32,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:16:32,128 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2023-12-18 21:16:32,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 21:16:32,129 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-18 21:16:32,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:16:32,130 INFO L225 Difference]: With dead ends: 35 [2023-12-18 21:16:32,130 INFO L226 Difference]: Without dead ends: 21 [2023-12-18 21:16:32,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-12-18 21:16:32,137 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:16:32,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 24 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:16:32,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-18 21:16:32,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2023-12-18 21:16:32,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:32,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-12-18 21:16:32,149 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 17 [2023-12-18 21:16:32,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:16:32,149 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-12-18 21:16:32,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:32,149 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-12-18 21:16:32,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-18 21:16:32,150 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:16:32,150 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:16:32,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-18 21:16:32,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:16:32,351 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:16:32,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:16:32,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1060569855, now seen corresponding path program 2 times [2023-12-18 21:16:32,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:16:32,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135137369] [2023-12-18 21:16:32,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:16:32,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:16:32,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:16:32,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:32,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:16:32,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135137369] [2023-12-18 21:16:32,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135137369] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:16:32,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309030737] [2023-12-18 21:16:32,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:16:32,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:16:32,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:16:32,736 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) [2023-12-18 21:16:32,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 21:16:32,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:16:32,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:16:32,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-18 21:16:32,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:16:32,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:16:32,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:16:32,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:16:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:32,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:16:33,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2023-12-18 21:16:33,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-18 21:16:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:33,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309030737] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:16:33,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:16:33,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2023-12-18 21:16:33,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019409816] [2023-12-18 21:16:33,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:16:33,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 21:16:33,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:16:33,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 21:16:33,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-12-18 21:16:33,064 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:33,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:16:33,156 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-12-18 21:16:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 21:16:33,156 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-18 21:16:33,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:16:33,156 INFO L225 Difference]: With dead ends: 34 [2023-12-18 21:16:33,156 INFO L226 Difference]: Without dead ends: 23 [2023-12-18 21:16:33,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-12-18 21:16:33,157 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:16:33,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 49 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:16:33,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-18 21:16:33,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-12-18 21:16:33,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-12-18 21:16:33,160 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 18 [2023-12-18 21:16:33,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:16:33,160 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-12-18 21:16:33,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:33,161 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-12-18 21:16:33,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-18 21:16:33,161 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:16:33,161 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:16:33,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-18 21:16:33,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:16:33,366 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:16:33,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:16:33,366 INFO L85 PathProgramCache]: Analyzing trace with hash -60842589, now seen corresponding path program 3 times [2023-12-18 21:16:33,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:16:33,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586185763] [2023-12-18 21:16:33,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:16:33,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:16:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:16:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:33,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:16:33,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586185763] [2023-12-18 21:16:33,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586185763] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:16:33,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163918166] [2023-12-18 21:16:33,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:16:33,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:16:33,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:16:33,448 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) [2023-12-18 21:16:33,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 21:16:33,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-18 21:16:33,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:16:33,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 21:16:33,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:16:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:33,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:16:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:33,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163918166] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:16:33,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:16:33,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-18 21:16:33,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128271326] [2023-12-18 21:16:33,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:16:33,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-18 21:16:33,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:16:33,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-18 21:16:33,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-18 21:16:33,622 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:33,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:16:33,689 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2023-12-18 21:16:33,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 21:16:33,689 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-18 21:16:33,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:16:33,690 INFO L225 Difference]: With dead ends: 45 [2023-12-18 21:16:33,690 INFO L226 Difference]: Without dead ends: 25 [2023-12-18 21:16:33,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-12-18 21:16:33,690 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:16:33,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 26 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:16:33,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-18 21:16:33,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-12-18 21:16:33,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-12-18 21:16:33,694 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 21 [2023-12-18 21:16:33,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:16:33,694 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-12-18 21:16:33,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:33,694 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-12-18 21:16:33,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-18 21:16:33,694 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:16:33,694 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:16:33,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-18 21:16:33,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:16:33,902 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:16:33,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:16:33,902 INFO L85 PathProgramCache]: Analyzing trace with hash -673683682, now seen corresponding path program 4 times [2023-12-18 21:16:33,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:16:33,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644248560] [2023-12-18 21:16:33,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:16:33,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:16:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:16:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:34,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:16:34,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644248560] [2023-12-18 21:16:34,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644248560] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:16:34,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202961581] [2023-12-18 21:16:34,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:16:34,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:16:34,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:16:34,317 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) [2023-12-18 21:16:34,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 21:16:34,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:16:34,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:16:34,362 WARN L260 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-18 21:16:34,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:16:34,367 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 16 treesize of output 12 [2023-12-18 21:16:34,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2023-12-18 21:16:34,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:16:34,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-18 21:16:34,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 21:16:34,852 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-12-18 21:16:34,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 40 [2023-12-18 21:16:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:16:34,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:16:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:16:35,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202961581] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:16:35,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:16:35,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 35 [2023-12-18 21:16:35,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988299003] [2023-12-18 21:16:35,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:16:35,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-18 21:16:35,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:16:35,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-18 21:16:35,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 21:16:35,296 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:36,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:16:36,657 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2023-12-18 21:16:36,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-18 21:16:36,658 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-18 21:16:36,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:16:36,658 INFO L225 Difference]: With dead ends: 54 [2023-12-18 21:16:36,658 INFO L226 Difference]: Without dead ends: 38 [2023-12-18 21:16:36,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=750, Invalid=3032, Unknown=0, NotChecked=0, Total=3782 [2023-12-18 21:16:36,660 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 136 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:16:36,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 58 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:16:36,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-18 21:16:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2023-12-18 21:16:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:36,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-12-18 21:16:36,664 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2023-12-18 21:16:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:16:36,664 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-12-18 21:16:36,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-12-18 21:16:36,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-18 21:16:36,665 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:16:36,665 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:16:36,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 21:16:36,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:16:36,869 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:16:36,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:16:36,869 INFO L85 PathProgramCache]: Analyzing trace with hash -354916506, now seen corresponding path program 5 times [2023-12-18 21:16:36,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:16:36,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279797322] [2023-12-18 21:16:36,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:16:36,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:16:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:16:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 38 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:36,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:16:36,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279797322] [2023-12-18 21:16:36,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279797322] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:16:36,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107996042] [2023-12-18 21:16:36,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:16:36,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:16:36,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:16:36,970 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) [2023-12-18 21:16:36,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 21:16:37,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-18 21:16:37,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:16:37,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 21:16:37,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:16:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 51 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:37,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:16:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 42 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:37,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107996042] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:16:37,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:16:37,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2023-12-18 21:16:37,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412901998] [2023-12-18 21:16:37,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:16:37,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-18 21:16:37,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:16:37,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-18 21:16:37,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2023-12-18 21:16:37,234 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:37,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:16:37,464 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2023-12-18 21:16:37,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-18 21:16:37,464 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-18 21:16:37,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:16:37,467 INFO L225 Difference]: With dead ends: 107 [2023-12-18 21:16:37,467 INFO L226 Difference]: Without dead ends: 37 [2023-12-18 21:16:37,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=517, Invalid=1553, Unknown=0, NotChecked=0, Total=2070 [2023-12-18 21:16:37,469 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 104 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:16:37,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 35 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:16:37,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-18 21:16:37,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2023-12-18 21:16:37,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-12-18 21:16:37,480 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 31 [2023-12-18 21:16:37,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:16:37,480 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-12-18 21:16:37,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:37,481 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-12-18 21:16:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-18 21:16:37,482 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:16:37,483 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:16:37,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-18 21:16:37,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:16:37,685 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:16:37,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:16:37,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1043511359, now seen corresponding path program 6 times [2023-12-18 21:16:37,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:16:37,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250892665] [2023-12-18 21:16:37,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:16:37,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:16:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:16:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:38,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:16:38,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250892665] [2023-12-18 21:16:38,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250892665] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:16:38,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804269505] [2023-12-18 21:16:38,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:16:38,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:16:38,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:16:38,853 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) [2023-12-18 21:16:38,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 21:16:38,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-12-18 21:16:38,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:16:38,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 81 conjunts are in the unsatisfiable core [2023-12-18 21:16:38,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:16:38,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:16:38,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-18 21:16:38,971 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:16:38,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-18 21:16:38,984 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:16:38,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-18 21:16:39,006 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:16:39,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-18 21:16:39,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:16:39,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-18 21:16:39,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2023-12-18 21:16:39,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2023-12-18 21:16:39,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2023-12-18 21:16:39,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2023-12-18 21:16:39,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:16:39,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:16:39,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:16:39,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:16:39,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:16:39,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:16:39,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:16:39,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:16:39,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:16:39,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:16:39,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:16:39,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:16:39,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:16:39,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:16:39,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:16:39,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 34 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 86 treesize of output 116 [2023-12-18 21:16:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:39,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:16:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:16:40,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804269505] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:16:40,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:16:40,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24, 22] total 51 [2023-12-18 21:16:40,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544429168] [2023-12-18 21:16:40,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:16:40,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-18 21:16:40,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:16:40,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-18 21:16:40,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=2236, Unknown=0, NotChecked=0, Total=2550 [2023-12-18 21:16:40,700 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 51 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 51 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:45,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:16:45,988 INFO L93 Difference]: Finished difference Result 141 states and 180 transitions. [2023-12-18 21:16:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-12-18 21:16:45,989 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 51 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-18 21:16:45,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:16:45,991 INFO L225 Difference]: With dead ends: 141 [2023-12-18 21:16:45,991 INFO L226 Difference]: Without dead ends: 114 [2023-12-18 21:16:45,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4084 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2577, Invalid=11703, Unknown=0, NotChecked=0, Total=14280 [2023-12-18 21:16:45,994 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 390 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-18 21:16:45,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 127 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-18 21:16:45,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-18 21:16:46,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 95. [2023-12-18 21:16:46,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1808510638297873) internal successors, (111), 94 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2023-12-18 21:16:46,010 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 34 [2023-12-18 21:16:46,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:16:46,010 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2023-12-18 21:16:46,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 51 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:46,010 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2023-12-18 21:16:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-18 21:16:46,011 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:16:46,011 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:16:46,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-18 21:16:46,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:16:46,216 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:16:46,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:16:46,216 INFO L85 PathProgramCache]: Analyzing trace with hash -782885594, now seen corresponding path program 7 times [2023-12-18 21:16:46,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:16:46,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153192894] [2023-12-18 21:16:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:16:46,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:16:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:16:46,495 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 179 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:46,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:16:46,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153192894] [2023-12-18 21:16:46,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153192894] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:16:46,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409145415] [2023-12-18 21:16:46,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:16:46,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:16:46,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:16:46,496 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) [2023-12-18 21:16:46,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-18 21:16:46,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:16:46,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-18 21:16:46,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:16:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 180 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-18 21:16:46,768 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:16:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 180 proven. 28 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-18 21:16:46,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409145415] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:16:46,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:16:46,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 33 [2023-12-18 21:16:46,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397947462] [2023-12-18 21:16:46,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:16:46,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-18 21:16:46,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:16:46,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-18 21:16:46,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2023-12-18 21:16:46,912 INFO L87 Difference]: Start difference. First operand 95 states and 111 transitions. Second operand has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:47,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:16:47,157 INFO L93 Difference]: Finished difference Result 175 states and 199 transitions. [2023-12-18 21:16:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-18 21:16:47,157 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-12-18 21:16:47,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:16:47,157 INFO L225 Difference]: With dead ends: 175 [2023-12-18 21:16:47,158 INFO L226 Difference]: Without dead ends: 55 [2023-12-18 21:16:47,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 81 SyntacticMatches, 15 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=524, Invalid=1828, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 21:16:47,159 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 110 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:16:47,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 29 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:16:47,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-18 21:16:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-12-18 21:16:47,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 54 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:47,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2023-12-18 21:16:47,167 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 53 [2023-12-18 21:16:47,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:16:47,167 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2023-12-18 21:16:47,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:47,167 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2023-12-18 21:16:47,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-18 21:16:47,168 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:16:47,168 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:16:47,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-18 21:16:47,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:16:47,375 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:16:47,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:16:47,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1508754783, now seen corresponding path program 8 times [2023-12-18 21:16:47,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:16:47,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984153564] [2023-12-18 21:16:47,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:16:47,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:16:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:16:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 179 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:47,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:16:47,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984153564] [2023-12-18 21:16:47,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984153564] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:16:47,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009752105] [2023-12-18 21:16:47,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:16:47,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:16:47,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:16:47,695 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) [2023-12-18 21:16:47,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 21:16:47,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:16:47,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:16:47,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-18 21:16:47,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:16:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 192 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:16:47,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:16:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 192 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-18 21:16:48,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009752105] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:16:48,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:16:48,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 35 [2023-12-18 21:16:48,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820703056] [2023-12-18 21:16:48,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:16:48,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-18 21:16:48,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:16:48,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-18 21:16:48,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 21:16:48,154 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 35 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:48,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:16:48,372 INFO L93 Difference]: Finished difference Result 121 states and 137 transitions. [2023-12-18 21:16:48,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-18 21:16:48,372 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 35 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-12-18 21:16:48,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:16:48,373 INFO L225 Difference]: With dead ends: 121 [2023-12-18 21:16:48,373 INFO L226 Difference]: Without dead ends: 56 [2023-12-18 21:16:48,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 80 SyntacticMatches, 17 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2023-12-18 21:16:48,374 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 96 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:16:48,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 50 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:16:48,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-18 21:16:48,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-12-18 21:16:48,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:48,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2023-12-18 21:16:48,383 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 54 [2023-12-18 21:16:48,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:16:48,383 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2023-12-18 21:16:48,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 35 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:48,383 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2023-12-18 21:16:48,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-18 21:16:48,384 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:16:48,384 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:16:48,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-18 21:16:48,590 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,SelfDestructingSolverStorable10 [2023-12-18 21:16:48,591 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:16:48,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:16:48,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1759104134, now seen corresponding path program 9 times [2023-12-18 21:16:48,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:16:48,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331622472] [2023-12-18 21:16:48,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:16:48,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:16:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:16:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 179 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:48,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:16:48,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331622472] [2023-12-18 21:16:48,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331622472] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:16:48,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934057411] [2023-12-18 21:16:48,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:16:48,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:16:48,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:16:48,877 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) [2023-12-18 21:16:48,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-18 21:16:49,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-12-18 21:16:49,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:16:49,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-18 21:16:49,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:16:49,386 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 210 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:49,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:16:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 210 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:49,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934057411] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:16:49,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:16:49,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 44 [2023-12-18 21:16:49,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908196906] [2023-12-18 21:16:49,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:16:49,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-18 21:16:49,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:16:49,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-18 21:16:49,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=1426, Unknown=0, NotChecked=0, Total=1892 [2023-12-18 21:16:49,597 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 44 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 44 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:50,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:16:50,302 INFO L93 Difference]: Finished difference Result 236 states and 265 transitions. [2023-12-18 21:16:50,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-12-18 21:16:50,303 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 44 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-12-18 21:16:50,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:16:50,304 INFO L225 Difference]: With dead ends: 236 [2023-12-18 21:16:50,304 INFO L226 Difference]: Without dead ends: 61 [2023-12-18 21:16:50,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 75 SyntacticMatches, 16 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3121 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2094, Invalid=7218, Unknown=0, NotChecked=0, Total=9312 [2023-12-18 21:16:50,308 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 393 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 21:16:50,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 28 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 21:16:50,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-18 21:16:50,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2023-12-18 21:16:50,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:50,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2023-12-18 21:16:50,320 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 55 [2023-12-18 21:16:50,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:16:50,320 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2023-12-18 21:16:50,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 44 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:16:50,320 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2023-12-18 21:16:50,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-18 21:16:50,321 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:16:50,321 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:16:50,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-18 21:16:50,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:16:50,526 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:16:50,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:16:50,527 INFO L85 PathProgramCache]: Analyzing trace with hash -463860767, now seen corresponding path program 10 times [2023-12-18 21:16:50,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:16:50,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385454789] [2023-12-18 21:16:50,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:16:50,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:16:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:16:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 28 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:16:54,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:16:54,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385454789] [2023-12-18 21:16:54,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385454789] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:16:54,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040612624] [2023-12-18 21:16:54,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:16:54,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:16:54,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:16:54,908 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) [2023-12-18 21:16:54,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-18 21:16:54,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:16:54,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:16:54,991 WARN L260 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 151 conjunts are in the unsatisfiable core [2023-12-18 21:16:54,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:16:55,002 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 16 treesize of output 12 [2023-12-18 21:16:55,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-12-18 21:16:55,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:16:55,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2023-12-18 21:16:55,112 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:16:55,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 58 [2023-12-18 21:16:55,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:16:55,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 73 [2023-12-18 21:16:55,202 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:16:55,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 88 [2023-12-18 21:16:55,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:16:55,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 89 treesize of output 103 [2023-12-18 21:16:55,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:16:55,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 101 treesize of output 118 [2023-12-18 21:16:55,400 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:16:55,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 113 treesize of output 133 [2023-12-18 21:16:55,476 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:16:55,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 125 treesize of output 148 [2023-12-18 21:16:55,561 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:16:55,561 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 45 case distinctions, treesize of input 136 treesize of output 162 [2023-12-18 21:16:55,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:16:56,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-12-18 21:16:56,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2023-12-18 21:16:56,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2023-12-18 21:16:57,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 40 [2023-12-18 21:16:57,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 47 [2023-12-18 21:16:57,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 54 [2023-12-18 21:16:58,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2023-12-18 21:16:58,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 68 [2023-12-18 21:16:58,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 75 [2023-12-18 21:16:59,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 82 [2023-12-18 21:17:00,616 INFO L349 Elim1Store]: treesize reduction 440, result has 54.6 percent of original size [2023-12-18 21:17:00,616 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 233 treesize of output 596 [2023-12-18 21:17:00,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 184 [2023-12-18 21:17:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 67 proven. 220 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:17:01,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:17:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 21:17:03,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040612624] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:17:03,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:17:03,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 42, 42] total 108 [2023-12-18 21:17:03,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536816224] [2023-12-18 21:17:03,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:17:03,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-12-18 21:17:03,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:17:03,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-12-18 21:17:03,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1417, Invalid=10139, Unknown=0, NotChecked=0, Total=11556 [2023-12-18 21:17:03,922 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 108 states, 108 states have (on average 1.4814814814814814) internal successors, (160), 108 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:17:15,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:17:15,894 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2023-12-18 21:17:15,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-12-18 21:17:15,894 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.4814814814814814) internal successors, (160), 108 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-12-18 21:17:15,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:17:15,895 INFO L225 Difference]: With dead ends: 108 [2023-12-18 21:17:15,895 INFO L226 Difference]: Without dead ends: 65 [2023-12-18 21:17:15,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6488 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=3308, Invalid=20254, Unknown=0, NotChecked=0, Total=23562 [2023-12-18 21:17:15,898 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 381 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 1888 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 2095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-18 21:17:15,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 125 Invalid, 2095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1888 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-18 21:17:15,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-18 21:17:15,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-12-18 21:17:15,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:17:15,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2023-12-18 21:17:15,917 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 58 [2023-12-18 21:17:15,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:17:15,917 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2023-12-18 21:17:15,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.4814814814814814) internal successors, (160), 108 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:17:15,917 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2023-12-18 21:17:15,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-18 21:17:15,918 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:17:15,918 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:17:15,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-18 21:17:16,120 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,SelfDestructingSolverStorable12 [2023-12-18 21:17:16,120 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:17:16,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:17:16,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1383003999, now seen corresponding path program 11 times [2023-12-18 21:17:16,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:17:16,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701355284] [2023-12-18 21:17:16,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:17:16,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:17:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:17:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 250 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:17:16,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:17:16,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701355284] [2023-12-18 21:17:16,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701355284] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:17:16,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488814214] [2023-12-18 21:17:16,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:17:16,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:17:16,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:17:16,510 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) [2023-12-18 21:17:16,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-18 21:17:16,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2023-12-18 21:17:16,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:17:16,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-18 21:17:16,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:17:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 287 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:17:17,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:17:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 262 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:17:17,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488814214] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:17:17,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:17:17,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 49 [2023-12-18 21:17:17,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805743196] [2023-12-18 21:17:17,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:17:17,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-18 21:17:17,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:17:17,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-18 21:17:17,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=564, Invalid=1788, Unknown=0, NotChecked=0, Total=2352 [2023-12-18 21:17:17,553 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 49 states, 49 states have (on average 2.4081632653061225) internal successors, (118), 49 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:17:17,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:17:17,943 INFO L93 Difference]: Finished difference Result 158 states and 161 transitions. [2023-12-18 21:17:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-12-18 21:17:17,943 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.4081632653061225) internal successors, (118), 49 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-12-18 21:17:17,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:17:17,943 INFO L225 Difference]: With dead ends: 158 [2023-12-18 21:17:17,944 INFO L226 Difference]: Without dead ends: 69 [2023-12-18 21:17:17,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 86 SyntacticMatches, 23 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2230 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1196, Invalid=4504, Unknown=0, NotChecked=0, Total=5700 [2023-12-18 21:17:17,945 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 196 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:17:17,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 51 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:17:17,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-18 21:17:17,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2023-12-18 21:17:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0303030303030303) internal successors, (68), 66 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:17:17,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2023-12-18 21:17:17,963 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2023-12-18 21:17:17,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:17:17,963 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2023-12-18 21:17:17,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.4081632653061225) internal successors, (118), 49 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:17:17,963 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2023-12-18 21:17:17,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-18 21:17:17,964 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:17:17,964 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:17:17,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-18 21:17:18,170 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,SelfDestructingSolverStorable13 [2023-12-18 21:17:18,170 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:17:18,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:17:18,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1462239935, now seen corresponding path program 12 times [2023-12-18 21:17:18,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:17:18,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273916743] [2023-12-18 21:17:18,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:17:18,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:17:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:17:23,837 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:17:23,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:17:23,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273916743] [2023-12-18 21:17:23,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273916743] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:17:23,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059928772] [2023-12-18 21:17:23,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:17:23,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:17:23,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:17:23,838 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) [2023-12-18 21:17:23,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-18 21:17:24,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2023-12-18 21:17:24,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:17:24,341 WARN L260 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 182 conjunts are in the unsatisfiable core [2023-12-18 21:17:24,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:17:24,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:17:24,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-18 21:17:24,374 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:17:24,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-18 21:17:24,383 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:17:24,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-18 21:17:24,407 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:17:24,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-18 21:17:24,421 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:17:24,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-12-18 21:17:24,453 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:17:24,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-12-18 21:17:24,546 INFO L349 Elim1Store]: treesize reduction 112, result has 30.9 percent of original size [2023-12-18 21:17:24,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 65 treesize of output 82 [2023-12-18 21:17:24,662 INFO L349 Elim1Store]: treesize reduction 168, result has 22.9 percent of original size [2023-12-18 21:17:24,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 35 case distinctions, treesize of input 76 treesize of output 96 [2023-12-18 21:17:24,791 INFO L349 Elim1Store]: treesize reduction 224, result has 18.2 percent of original size [2023-12-18 21:17:24,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 43 case distinctions, treesize of input 87 treesize of output 110 [2023-12-18 21:17:24,940 INFO L349 Elim1Store]: treesize reduction 280, result has 15.2 percent of original size [2023-12-18 21:17:24,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 52 case distinctions, treesize of input 98 treesize of output 124 [2023-12-18 21:17:25,137 INFO L349 Elim1Store]: treesize reduction 336, result has 13.0 percent of original size [2023-12-18 21:17:25,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 21 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 62 case distinctions, treesize of input 109 treesize of output 138 [2023-12-18 21:17:25,370 INFO L349 Elim1Store]: treesize reduction 392, result has 11.3 percent of original size [2023-12-18 21:17:25,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 36 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 73 case distinctions, treesize of input 118 treesize of output 150 [2023-12-18 21:17:25,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:17:25,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:26,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:26,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:26,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:26,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:26,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:27,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:27,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2023-12-18 21:17:27,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2023-12-18 21:17:27,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2023-12-18 21:17:28,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2023-12-18 21:17:28,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2023-12-18 21:17:29,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2023-12-18 21:17:29,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:17:29,220 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:17:29,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 19 select indices, 19 select index equivalence classes, 150 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 153 treesize of output 221 [2023-12-18 21:17:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 16 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:17:29,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:17:33,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 437 treesize of output 423 [2023-12-18 21:17:33,566 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:17:33,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 832696941433479 treesize of output 709551639122567 [2023-12-18 21:17:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:17:36,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059928772] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:17:36,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:17:36,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 44, 50] total 116 [2023-12-18 21:17:36,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398626063] [2023-12-18 21:17:36,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:17:36,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2023-12-18 21:17:36,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:17:36,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2023-12-18 21:17:36,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1817, Invalid=11523, Unknown=0, NotChecked=0, Total=13340 [2023-12-18 21:17:36,749 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 116 states, 116 states have (on average 1.5344827586206897) internal successors, (178), 116 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:17:47,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:17:47,316 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2023-12-18 21:17:47,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-12-18 21:17:47,317 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.5344827586206897) internal successors, (178), 116 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-12-18 21:17:47,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:17:47,317 INFO L225 Difference]: With dead ends: 75 [2023-12-18 21:17:47,317 INFO L226 Difference]: Without dead ends: 71 [2023-12-18 21:17:47,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6121 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=3306, Invalid=19344, Unknown=0, NotChecked=0, Total=22650 [2023-12-18 21:17:47,319 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 277 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 2874 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 3013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 2874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-18 21:17:47,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 117 Invalid, 3013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 2874 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-18 21:17:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-18 21:17:47,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2023-12-18 21:17:47,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:17:47,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2023-12-18 21:17:47,338 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 66 [2023-12-18 21:17:47,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:17:47,339 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2023-12-18 21:17:47,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.5344827586206897) internal successors, (178), 116 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:17:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2023-12-18 21:17:47,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-18 21:17:47,339 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:17:47,339 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:17:47,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-18 21:17:47,540 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,SelfDestructingSolverStorable14 [2023-12-18 21:17:47,540 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:17:47,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:17:47,540 INFO L85 PathProgramCache]: Analyzing trace with hash -435309213, now seen corresponding path program 13 times [2023-12-18 21:17:47,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:17:47,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769337064] [2023-12-18 21:17:47,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:17:47,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:17:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:17:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 290 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:17:47,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:17:47,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769337064] [2023-12-18 21:17:47,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769337064] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:17:47,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127337686] [2023-12-18 21:17:47,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:17:47,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:17:47,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:17:47,956 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) [2023-12-18 21:17:47,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-18 21:17:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:17:48,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-18 21:17:48,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:17:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 330 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:17:48,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:17:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 330 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:17:48,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127337686] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:17:48,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:17:48,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-12-18 21:17:48,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165762419] [2023-12-18 21:17:48,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:17:48,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-18 21:17:48,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:17:48,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-18 21:17:48,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-12-18 21:17:48,747 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 50 states, 50 states have (on average 2.38) internal successors, (119), 50 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:17:49,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:17:49,026 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2023-12-18 21:17:49,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-18 21:17:49,027 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 50 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-12-18 21:17:49,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:17:49,027 INFO L225 Difference]: With dead ends: 124 [2023-12-18 21:17:49,027 INFO L226 Difference]: Without dead ends: 73 [2023-12-18 21:17:49,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 92 SyntacticMatches, 29 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2023-12-18 21:17:49,028 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 124 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:17:49,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 46 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:17:49,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-18 21:17:49,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2023-12-18 21:17:49,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:17:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2023-12-18 21:17:49,049 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 69 [2023-12-18 21:17:49,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:17:49,049 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2023-12-18 21:17:49,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.38) internal successors, (119), 50 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:17:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2023-12-18 21:17:49,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-12-18 21:17:49,049 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:17:49,049 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:17:49,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-18 21:17:49,254 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,SelfDestructingSolverStorable15 [2023-12-18 21:17:49,254 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:17:49,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:17:49,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1030914850, now seen corresponding path program 14 times [2023-12-18 21:17:49,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:17:49,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656998290] [2023-12-18 21:17:49,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:17:49,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:17:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:17:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:17:54,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:17:54,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656998290] [2023-12-18 21:17:54,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656998290] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:17:54,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246412748] [2023-12-18 21:17:54,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:17:54,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:17:54,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:17:54,454 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) [2023-12-18 21:17:54,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-18 21:17:54,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:17:54,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:17:54,568 WARN L260 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 187 conjunts are in the unsatisfiable core [2023-12-18 21:17:54,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:17:54,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:17:54,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-18 21:17:54,603 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:17:54,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-18 21:17:54,613 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:17:54,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2023-12-18 21:17:54,625 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:17:54,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2023-12-18 21:17:54,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:17:54,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2023-12-18 21:17:54,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:17:54,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2023-12-18 21:17:54,674 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:17:54,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2023-12-18 21:17:54,695 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:17:54,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2023-12-18 21:17:54,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:17:54,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 98 [2023-12-18 21:17:54,743 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:17:54,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 55 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 82 treesize of output 108 [2023-12-18 21:17:54,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:17:54,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 66 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 89 treesize of output 118 [2023-12-18 21:17:54,827 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:17:54,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 78 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 96 treesize of output 128 [2023-12-18 21:17:54,861 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:17:54,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 91 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 103 treesize of output 138 [2023-12-18 21:17:54,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:17:55,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:55,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:55,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:55,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:55,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:55,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:56,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:56,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:56,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:56,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:56,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:56,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:57,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:57,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:17:57,416 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:17:57,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:18:04,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1655 treesize of output 1627