/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/s4if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 21:35:29,434 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 21:35:29,505 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 21:35:29,508 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 21:35:29,508 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 21:35:29,525 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 21:35:29,526 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 21:35:29,526 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 21:35:29,526 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 21:35:29,529 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 21:35:29,530 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 21:35:29,530 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 21:35:29,530 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 21:35:29,531 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 21:35:29,532 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 21:35:29,532 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 21:35:29,532 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 21:35:29,532 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 21:35:29,532 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 21:35:29,533 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 21:35:29,533 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 21:35:29,534 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 21:35:29,534 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 21:35:29,534 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 21:35:29,534 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 21:35:29,534 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 21:35:29,534 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 21:35:29,535 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 21:35:29,535 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 21:35:29,535 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 21:35:29,536 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 21:35:29,536 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 21:35:29,536 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 21:35:29,536 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 21:35:29,536 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 21:35:29,536 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 21:35:29,537 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 21:35:29,537 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 21:35:29,537 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 21:35:29,537 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 21:35:29,537 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 21:35:29,537 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 21:35:29,537 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 21:35:29,537 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 21:35:29,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 21:35:29,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 21:35:29,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 21:35:29,762 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 21:35:29,762 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 21:35:29,763 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4if.c [2023-12-18 21:35:30,847 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 21:35:31,000 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 21:35:31,001 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s4if.c [2023-12-18 21:35:31,007 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a038139/ca6e2073ed2b48d6ba2762e1988c7cd2/FLAG978d66fef [2023-12-18 21:35:31,021 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98a038139/ca6e2073ed2b48d6ba2762e1988c7cd2 [2023-12-18 21:35:31,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 21:35:31,023 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 21:35:31,026 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 21:35:31,026 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 21:35:31,030 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 21:35:31,030 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:35:31" (1/1) ... [2023-12-18 21:35:31,031 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5426a935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:35:31, skipping insertion in model container [2023-12-18 21:35:31,031 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 09:35:31" (1/1) ... [2023-12-18 21:35:31,048 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 21:35:31,165 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/s4if.c[587,600] [2023-12-18 21:35:31,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 21:35:31,185 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 21:35:31,194 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/s4if.c[587,600] [2023-12-18 21:35:31,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 21:35:31,210 INFO L206 MainTranslator]: Completed translation [2023-12-18 21:35:31,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:35:31 WrapperNode [2023-12-18 21:35:31,211 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 21:35:31,212 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 21:35:31,212 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 21:35:31,212 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 21:35:31,217 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:35:31" (1/1) ... [2023-12-18 21:35:31,222 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:35:31" (1/1) ... [2023-12-18 21:35:31,236 INFO L138 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2023-12-18 21:35:31,237 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 21:35:31,237 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 21:35:31,237 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 21:35:31,237 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 21:35:31,258 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:35:31" (1/1) ... [2023-12-18 21:35:31,259 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:35:31" (1/1) ... [2023-12-18 21:35:31,260 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:35:31" (1/1) ... [2023-12-18 21:35:31,280 INFO L175 MemorySlicer]: Split 19 memory accesses to 4 slices as follows [2, 7, 4, 6]. 37 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 4 writes are split as follows [0, 0, 1, 3]. [2023-12-18 21:35:31,281 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:35:31" (1/1) ... [2023-12-18 21:35:31,281 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:35:31" (1/1) ... [2023-12-18 21:35:31,286 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:35:31" (1/1) ... [2023-12-18 21:35:31,288 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:35:31" (1/1) ... [2023-12-18 21:35:31,289 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:35:31" (1/1) ... [2023-12-18 21:35:31,289 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:35:31" (1/1) ... [2023-12-18 21:35:31,291 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 21:35:31,292 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 21:35:31,292 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 21:35:31,292 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 21:35:31,292 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:35:31" (1/1) ... [2023-12-18 21:35:31,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 21:35:31,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:31,318 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 21:35:31,340 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 21:35:31,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 21:35:31,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 21:35:31,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 21:35:31,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 21:35:31,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-18 21:35:31,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-18 21:35:31,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 21:35:31,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 21:35:31,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 21:35:31,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-18 21:35:31,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-18 21:35:31,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 21:35:31,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 21:35:31,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 21:35:31,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 21:35:31,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 21:35:31,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-18 21:35:31,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-18 21:35:31,423 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 21:35:31,424 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 21:35:31,511 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 21:35:31,543 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 21:35:31,544 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-18 21:35:31,544 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:35:31 BoogieIcfgContainer [2023-12-18 21:35:31,544 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 21:35:31,546 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 21:35:31,546 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 21:35:31,548 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 21:35:31,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 09:35:31" (1/3) ... [2023-12-18 21:35:31,549 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ebdc717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:35:31, skipping insertion in model container [2023-12-18 21:35:31,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 09:35:31" (2/3) ... [2023-12-18 21:35:31,549 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ebdc717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 09:35:31, skipping insertion in model container [2023-12-18 21:35:31,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 09:35:31" (3/3) ... [2023-12-18 21:35:31,550 INFO L112 eAbstractionObserver]: Analyzing ICFG s4if.c [2023-12-18 21:35:31,562 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 21:35:31,562 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 21:35:31,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 21:35:31,598 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;@6fbe9db8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 21:35:31,598 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 21:35:31,601 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 21:35:31,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-18 21:35:31,606 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:31,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:31,609 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:31,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:31,614 INFO L85 PathProgramCache]: Analyzing trace with hash -278767546, now seen corresponding path program 1 times [2023-12-18 21:35:31,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:31,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814726893] [2023-12-18 21:35:31,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:31,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:31,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:31,740 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 21:35:31,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:31,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814726893] [2023-12-18 21:35:31,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814726893] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:35:31,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:35:31,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 21:35:31,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693333927] [2023-12-18 21:35:31,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:35:31,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 21:35:31,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:31,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 21:35:31,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 21:35:31,766 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 21:35:31,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:31,782 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2023-12-18 21:35:31,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 21:35:31,784 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 21:35:31,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:31,789 INFO L225 Difference]: With dead ends: 29 [2023-12-18 21:35:31,789 INFO L226 Difference]: Without dead ends: 13 [2023-12-18 21:35:31,791 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 21:35:31,793 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 21:35:31,794 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 21:35:31,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-18 21:35:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-12-18 21:35:31,815 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 21:35:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-12-18 21:35:31,816 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2023-12-18 21:35:31,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:31,817 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-12-18 21:35:31,817 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 21:35:31,817 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-12-18 21:35:31,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-18 21:35:31,818 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:31,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:31,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-18 21:35:31,819 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:31,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:31,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1088114172, now seen corresponding path program 1 times [2023-12-18 21:35:31,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:31,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098391038] [2023-12-18 21:35:31,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:31,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:31,956 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 21:35:31,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:31,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098391038] [2023-12-18 21:35:31,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098391038] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 21:35:31,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 21:35:31,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-18 21:35:31,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583579561] [2023-12-18 21:35:31,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 21:35:31,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-18 21:35:31,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:31,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-18 21:35:31,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-18 21:35:31,959 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 21:35:31,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:31,986 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2023-12-18 21:35:31,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-18 21:35:31,987 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 21:35:31,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:31,987 INFO L225 Difference]: With dead ends: 25 [2023-12-18 21:35:31,987 INFO L226 Difference]: Without dead ends: 17 [2023-12-18 21:35:31,987 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 21:35:31,988 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:31,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 8 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:35:31,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-18 21:35:31,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2023-12-18 21:35:31,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:31,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-12-18 21:35:31,992 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2023-12-18 21:35:31,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:31,992 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-12-18 21:35:31,992 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 21:35:31,993 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-12-18 21:35:31,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-18 21:35:31,993 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:31,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:31,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-18 21:35:31,993 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:31,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:31,994 INFO L85 PathProgramCache]: Analyzing trace with hash 54367998, now seen corresponding path program 1 times [2023-12-18 21:35:31,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:31,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541362517] [2023-12-18 21:35:31,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:31,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:32,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:32,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541362517] [2023-12-18 21:35:32,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541362517] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:35:32,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140854504] [2023-12-18 21:35:32,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:32,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:32,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:32,546 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 21:35:32,587 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 21:35:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:32,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-18 21:35:32,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:32,683 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 21:35:32,789 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 21:35:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:32,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:32,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140854504] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:32,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:35:32,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2023-12-18 21:35:32,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074354672] [2023-12-18 21:35:32,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:32,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-18 21:35:32,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:32,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-18 21:35:32,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-12-18 21:35:32,949 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:33,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:33,170 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-12-18 21:35:33,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 21:35:33,170 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-18 21:35:33,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:33,173 INFO L225 Difference]: With dead ends: 33 [2023-12-18 21:35:33,173 INFO L226 Difference]: Without dead ends: 29 [2023-12-18 21:35:33,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2023-12-18 21:35:33,175 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:33,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 30 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:35:33,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-18 21:35:33,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2023-12-18 21:35:33,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:33,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-12-18 21:35:33,184 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2023-12-18 21:35:33,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:33,184 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-12-18 21:35:33,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:33,184 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-12-18 21:35:33,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-18 21:35:33,185 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:33,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:33,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-18 21:35:33,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:33,392 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:33,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:33,393 INFO L85 PathProgramCache]: Analyzing trace with hash 111626300, now seen corresponding path program 1 times [2023-12-18 21:35:33,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:33,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743449846] [2023-12-18 21:35:33,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:33,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:33,409 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:35:33,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133384640] [2023-12-18 21:35:33,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:33,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:33,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:33,410 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 21:35:33,450 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 21:35:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:33,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-18 21:35:33,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:33,477 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 21:35:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:33,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:33,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-12-18 21:35:33,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-12-18 21:35:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:33,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:33,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743449846] [2023-12-18 21:35:33,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:35:33,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133384640] [2023-12-18 21:35:33,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133384640] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:33,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:35:33,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-12-18 21:35:33,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702082562] [2023-12-18 21:35:33,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:33,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 21:35:33,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:33,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 21:35:33,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-18 21:35:33,548 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:33,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:33,581 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2023-12-18 21:35:33,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 21:35:33,582 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-18 21:35:33,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:33,582 INFO L225 Difference]: With dead ends: 35 [2023-12-18 21:35:33,582 INFO L226 Difference]: Without dead ends: 23 [2023-12-18 21:35:33,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-12-18 21:35:33,583 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:33,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 35 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:35:33,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-18 21:35:33,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-12-18 21:35:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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 21:35:33,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-12-18 21:35:33,587 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2023-12-18 21:35:33,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:33,587 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-12-18 21:35:33,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:33,587 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-12-18 21:35:33,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-18 21:35:33,587 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:33,588 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:33,595 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 21:35:33,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-18 21:35:33,792 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:33,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:33,793 INFO L85 PathProgramCache]: Analyzing trace with hash -230177790, now seen corresponding path program 2 times [2023-12-18 21:35:33,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:33,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012498557] [2023-12-18 21:35:33,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:33,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:33,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:33,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012498557] [2023-12-18 21:35:33,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012498557] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:35:33,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757904041] [2023-12-18 21:35:33,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:35:33,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:33,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:33,875 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 21:35:33,917 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 21:35:33,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:35:33,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:33,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 21:35:33,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:34,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:34,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757904041] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:34,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:35:34,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-12-18 21:35:34,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476036349] [2023-12-18 21:35:34,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:34,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 21:35:34,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:34,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 21:35:34,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-18 21:35:34,052 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:34,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:34,133 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2023-12-18 21:35:34,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-18 21:35:34,134 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-18 21:35:34,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:34,135 INFO L225 Difference]: With dead ends: 30 [2023-12-18 21:35:34,135 INFO L226 Difference]: Without dead ends: 26 [2023-12-18 21:35:34,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-12-18 21:35:34,136 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:34,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:35:34,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-18 21:35:34,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2023-12-18 21:35:34,139 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 21:35:34,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-12-18 21:35:34,139 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2023-12-18 21:35:34,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:34,139 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-12-18 21:35:34,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:34,140 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-12-18 21:35:34,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-18 21:35:34,140 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:34,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:34,147 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 21:35:34,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:34,347 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:34,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:34,348 INFO L85 PathProgramCache]: Analyzing trace with hash 2013377864, now seen corresponding path program 3 times [2023-12-18 21:35:34,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:34,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886319848] [2023-12-18 21:35:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:34,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:34,405 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 21:35:34,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:34,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886319848] [2023-12-18 21:35:34,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886319848] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:35:34,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300685135] [2023-12-18 21:35:34,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:35:34,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:34,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:34,407 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 21:35:34,420 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 21:35:34,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 21:35:34,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:34,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-18 21:35:34,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:34,518 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 21:35:34,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:34,543 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 21:35:34,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300685135] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:34,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:35:34,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-12-18 21:35:34,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343301448] [2023-12-18 21:35:34,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:34,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 21:35:34,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:34,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 21:35:34,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-18 21:35:34,546 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 21:35:34,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:34,600 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-12-18 21:35:34,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 21:35:34,601 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 21:35:34,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:34,601 INFO L225 Difference]: With dead ends: 33 [2023-12-18 21:35:34,601 INFO L226 Difference]: Without dead ends: 21 [2023-12-18 21:35:34,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-12-18 21:35:34,603 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:34,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:35:34,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-18 21:35:34,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2023-12-18 21:35:34,609 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 21:35:34,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-12-18 21:35:34,609 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 17 [2023-12-18 21:35:34,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:34,609 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-12-18 21:35:34,609 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 21:35:34,610 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-12-18 21:35:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-18 21:35:34,610 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:34,610 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:34,626 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 21:35:34,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:34,815 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:34,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:34,816 INFO L85 PathProgramCache]: Analyzing trace with hash -919717436, now seen corresponding path program 4 times [2023-12-18 21:35:34,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:34,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833422982] [2023-12-18 21:35:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:34,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:35,186 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 21:35:35,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:35,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833422982] [2023-12-18 21:35:35,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833422982] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:35:35,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198988014] [2023-12-18 21:35:35,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:35:35,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:35,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:35,187 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 21:35:35,212 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 21:35:35,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:35:35,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:35,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-18 21:35:35,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:35,247 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 21:35:35,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-18 21:35:35,483 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 21:35:35,493 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 21:35:35,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2023-12-18 21:35:35,530 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 21:35:35,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:35,761 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-18 21:35:35,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2023-12-18 21:35:35,966 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 21:35:35,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198988014] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:35,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:35:35,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2023-12-18 21:35:35,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435008659] [2023-12-18 21:35:35,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:35,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-18 21:35:35,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:35,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-18 21:35:35,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2023-12-18 21:35:35,968 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:36,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:36,962 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2023-12-18 21:35:36,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-18 21:35:36,962 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-18 21:35:36,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:36,963 INFO L225 Difference]: With dead ends: 53 [2023-12-18 21:35:36,963 INFO L226 Difference]: Without dead ends: 42 [2023-12-18 21:35:36,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=410, Invalid=2560, Unknown=0, NotChecked=0, Total=2970 [2023-12-18 21:35:36,965 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 39 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:36,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 76 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 21:35:36,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-18 21:35:36,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2023-12-18 21:35:36,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 21:35:36,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2023-12-18 21:35:36,970 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 18 [2023-12-18 21:35:36,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:36,970 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2023-12-18 21:35:36,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:36,971 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2023-12-18 21:35:36,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-18 21:35:36,971 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:36,971 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:36,995 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 21:35:37,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:37,177 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:37,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:37,177 INFO L85 PathProgramCache]: Analyzing trace with hash -862459134, now seen corresponding path program 1 times [2023-12-18 21:35:37,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:37,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670781013] [2023-12-18 21:35:37,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:37,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:37,192 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:35:37,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847955914] [2023-12-18 21:35:37,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:37,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:37,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:37,201 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 21:35:37,213 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 21:35:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:37,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-18 21:35:37,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:37,279 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 21:35:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:37,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:37,375 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 21:35:37,377 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 21:35:37,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:37,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:37,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670781013] [2023-12-18 21:35:37,397 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:35:37,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847955914] [2023-12-18 21:35:37,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847955914] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:37,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:35:37,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-12-18 21:35:37,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404118802] [2023-12-18 21:35:37,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:37,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-18 21:35:37,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:37,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-18 21:35:37,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-12-18 21:35:37,399 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:37,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:37,449 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2023-12-18 21:35:37,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 21:35:37,450 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-18 21:35:37,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:37,451 INFO L225 Difference]: With dead ends: 58 [2023-12-18 21:35:37,451 INFO L226 Difference]: Without dead ends: 40 [2023-12-18 21:35:37,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-18 21:35:37,453 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:37,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:35:37,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-18 21:35:37,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2023-12-18 21:35:37,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 21:35:37,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-12-18 21:35:37,460 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 18 [2023-12-18 21:35:37,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:37,460 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-12-18 21:35:37,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:37,460 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-12-18 21:35:37,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-18 21:35:37,460 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:37,460 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:37,480 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 21:35:37,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:37,667 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:37,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:37,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1651358520, now seen corresponding path program 5 times [2023-12-18 21:35:37,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:37,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207756628] [2023-12-18 21:35:37,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:37,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:37,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:37,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:37,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:37,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207756628] [2023-12-18 21:35:37,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207756628] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:35:37,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127401580] [2023-12-18 21:35:37,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:35:37,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:37,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:37,764 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 21:35:37,788 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 21:35:37,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-18 21:35:37,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:37,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 21:35:37,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:37,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:37,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127401580] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:37,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:35:37,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-18 21:35:37,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791405376] [2023-12-18 21:35:37,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:37,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-18 21:35:37,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:37,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-18 21:35:37,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-18 21:35:37,951 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:38,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:38,047 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2023-12-18 21:35:38,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 21:35:38,048 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-18 21:35:38,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:38,050 INFO L225 Difference]: With dead ends: 48 [2023-12-18 21:35:38,050 INFO L226 Difference]: Without dead ends: 44 [2023-12-18 21:35:38,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-12-18 21:35:38,052 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 42 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:38,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 16 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:35:38,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-18 21:35:38,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2023-12-18 21:35:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 21:35:38,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-12-18 21:35:38,065 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 19 [2023-12-18 21:35:38,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:38,065 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-12-18 21:35:38,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:38,065 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-12-18 21:35:38,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-18 21:35:38,066 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:38,066 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:38,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-18 21:35:38,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:38,273 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:38,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:38,273 INFO L85 PathProgramCache]: Analyzing trace with hash -109476352, now seen corresponding path program 2 times [2023-12-18 21:35:38,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:38,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763200505] [2023-12-18 21:35:38,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:38,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:38,293 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:35:38,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445279590] [2023-12-18 21:35:38,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:35:38,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:38,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:38,294 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 21:35:38,352 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 21:35:38,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:35:38,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:38,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-18 21:35:38,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:38,467 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 21:35:38,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:38,548 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 21:35:38,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:38,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763200505] [2023-12-18 21:35:38,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:35:38,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445279590] [2023-12-18 21:35:38,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445279590] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:38,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:35:38,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-12-18 21:35:38,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733570683] [2023-12-18 21:35:38,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:38,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-18 21:35:38,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:38,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-18 21:35:38,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-12-18 21:35:38,550 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:38,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:38,617 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2023-12-18 21:35:38,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 21:35:38,619 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-12-18 21:35:38,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:38,620 INFO L225 Difference]: With dead ends: 51 [2023-12-18 21:35:38,620 INFO L226 Difference]: Without dead ends: 25 [2023-12-18 21:35:38,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-12-18 21:35:38,620 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:38,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 17 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:35:38,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-18 21:35:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-12-18 21:35:38,624 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 21:35:38,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-12-18 21:35:38,624 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 21 [2023-12-18 21:35:38,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:38,624 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-12-18 21:35:38,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:38,624 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-12-18 21:35:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-18 21:35:38,625 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:38,625 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:38,632 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 21:35:38,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-18 21:35:38,832 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:38,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:38,833 INFO L85 PathProgramCache]: Analyzing trace with hash 472759102, now seen corresponding path program 6 times [2023-12-18 21:35:38,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:38,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249514530] [2023-12-18 21:35:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:38,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:39,397 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 21:35:39,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:39,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249514530] [2023-12-18 21:35:39,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249514530] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:35:39,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447438020] [2023-12-18 21:35:39,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:35:39,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:39,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:39,398 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 21:35:39,417 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 21:35:39,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-12-18 21:35:39,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:39,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-18 21:35:39,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:39,497 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 21:35:39,584 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 21:35:39,656 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 21:35:39,751 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 21:35:39,775 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 21:35:39,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:40,110 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 21:35:40,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447438020] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:40,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:35:40,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 37 [2023-12-18 21:35:40,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434012960] [2023-12-18 21:35:40,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:40,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-18 21:35:40,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:40,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-18 21:35:40,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1205, Unknown=0, NotChecked=0, Total=1332 [2023-12-18 21:35:40,112 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 37 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 37 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 21:35:40,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:40,590 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2023-12-18 21:35:40,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 21:35:40,591 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 37 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 21:35:40,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:40,591 INFO L225 Difference]: With dead ends: 42 [2023-12-18 21:35:40,591 INFO L226 Difference]: Without dead ends: 38 [2023-12-18 21:35:40,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=220, Invalid=1942, Unknown=0, NotChecked=0, Total=2162 [2023-12-18 21:35:40,592 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:40,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 84 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 21:35:40,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-18 21:35:40,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2023-12-18 21:35:40,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:40,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-12-18 21:35:40,597 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2023-12-18 21:35:40,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:40,597 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-12-18 21:35:40,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.4594594594594594) internal successors, (54), 37 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 21:35:40,597 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-12-18 21:35:40,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-18 21:35:40,597 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:40,598 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:40,604 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 21:35:40,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:40,804 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:40,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:40,804 INFO L85 PathProgramCache]: Analyzing trace with hash 530017404, now seen corresponding path program 3 times [2023-12-18 21:35:40,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:40,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516298177] [2023-12-18 21:35:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:40,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:40,827 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:35:40,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077028739] [2023-12-18 21:35:40,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:35:40,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:40,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:40,841 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 21:35:40,859 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 21:35:40,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 21:35:40,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:40,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-18 21:35:40,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:40,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-12-18 21:35:40,963 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:35:40,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-12-18 21:35:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:35:40,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:35:41,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:41,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516298177] [2023-12-18 21:35:41,050 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:35:41,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077028739] [2023-12-18 21:35:41,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077028739] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:41,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:35:41,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-12-18 21:35:41,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022665944] [2023-12-18 21:35:41,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:41,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-18 21:35:41,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:41,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-18 21:35:41,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-12-18 21:35:41,051 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:41,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:41,141 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2023-12-18 21:35:41,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-18 21:35:41,141 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-12-18 21:35:41,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:41,143 INFO L225 Difference]: With dead ends: 39 [2023-12-18 21:35:41,143 INFO L226 Difference]: Without dead ends: 35 [2023-12-18 21:35:41,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2023-12-18 21:35:41,144 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:41,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 14 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 21:35:41,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-18 21:35:41,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-12-18 21:35:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-12-18 21:35:41,152 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2023-12-18 21:35:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:41,152 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-12-18 21:35:41,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:41,152 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-12-18 21:35:41,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-18 21:35:41,153 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:41,153 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:41,169 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 21:35:41,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-18 21:35:41,359 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:41,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:41,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1177770942, now seen corresponding path program 7 times [2023-12-18 21:35:41,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:41,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634031668] [2023-12-18 21:35:41,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:41,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:41,484 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:41,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:41,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634031668] [2023-12-18 21:35:41,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634031668] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:35:41,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300695289] [2023-12-18 21:35:41,484 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:35:41,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:41,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:41,485 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 21:35:41,508 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 21:35:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:41,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 21:35:41,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:41,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:41,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300695289] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:41,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:35:41,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-18 21:35:41,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452531527] [2023-12-18 21:35:41,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:41,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 21:35:41,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:41,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 21:35:41,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-18 21:35:41,691 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 21:35:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:41,844 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-12-18 21:35:41,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-18 21:35:41,844 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 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 23 [2023-12-18 21:35:41,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:41,844 INFO L225 Difference]: With dead ends: 49 [2023-12-18 21:35:41,844 INFO L226 Difference]: Without dead ends: 45 [2023-12-18 21:35:41,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-12-18 21:35:41,845 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:41,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 31 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:35:41,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-18 21:35:41,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2023-12-18 21:35:41,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:41,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-12-18 21:35:41,850 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 23 [2023-12-18 21:35:41,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:41,850 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-12-18 21:35:41,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 21:35:41,850 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-12-18 21:35:41,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-18 21:35:41,850 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:41,850 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:41,870 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 21:35:42,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-18 21:35:42,056 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:42,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:42,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1987303160, now seen corresponding path program 8 times [2023-12-18 21:35:42,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:42,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11954671] [2023-12-18 21:35:42,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:42,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:42,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:42,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11954671] [2023-12-18 21:35:42,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11954671] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:35:42,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022014962] [2023-12-18 21:35:42,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:35:42,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:42,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:42,190 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 21:35:42,198 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 21:35:42,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:35:42,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:42,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-18 21:35:42,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:42,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:42,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022014962] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:42,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:35:42,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-18 21:35:42,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049060795] [2023-12-18 21:35:42,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:42,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-18 21:35:42,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:42,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-18 21:35:42,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-18 21:35:42,375 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:42,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:42,466 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2023-12-18 21:35:42,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 21:35:42,466 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-18 21:35:42,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:42,467 INFO L225 Difference]: With dead ends: 52 [2023-12-18 21:35:42,467 INFO L226 Difference]: Without dead ends: 32 [2023-12-18 21:35:42,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-12-18 21:35:42,467 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:42,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 26 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:35:42,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-18 21:35:42,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2023-12-18 21:35:42,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 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 21:35:42,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-12-18 21:35:42,472 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 25 [2023-12-18 21:35:42,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:42,472 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-12-18 21:35:42,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:42,473 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-12-18 21:35:42,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 21:35:42,473 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:42,473 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:42,480 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 21:35:42,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-18 21:35:42,678 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:42,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:42,678 INFO L85 PathProgramCache]: Analyzing trace with hash 152727940, now seen corresponding path program 9 times [2023-12-18 21:35:42,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:42,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462405678] [2023-12-18 21:35:42,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:42,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:43,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:43,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462405678] [2023-12-18 21:35:43,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462405678] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:35:43,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025665396] [2023-12-18 21:35:43,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:35:43,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:43,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:43,582 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 21:35:43,585 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 21:35:43,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-18 21:35:43,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:43,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 58 conjunts are in the unsatisfiable core [2023-12-18 21:35:43,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:43,697 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 21:35:43,886 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 21:35:43,966 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 21:35:44,061 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 21:35:44,171 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2023-12-18 21:35:44,172 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 45 treesize of output 13 [2023-12-18 21:35:44,174 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 21:35:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:44,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:44,706 INFO L349 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2023-12-18 21:35:44,707 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 50 treesize of output 17 [2023-12-18 21:35:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:44,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025665396] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:44,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:35:44,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 53 [2023-12-18 21:35:44,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444810754] [2023-12-18 21:35:44,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:44,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-18 21:35:44,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:44,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-18 21:35:44,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2566, Unknown=0, NotChecked=0, Total=2756 [2023-12-18 21:35:44,891 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 53 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 21:35:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:45,896 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2023-12-18 21:35:45,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-18 21:35:45,897 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-18 21:35:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:45,897 INFO L225 Difference]: With dead ends: 48 [2023-12-18 21:35:45,897 INFO L226 Difference]: Without dead ends: 44 [2023-12-18 21:35:45,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=337, Invalid=3953, Unknown=0, NotChecked=0, Total=4290 [2023-12-18 21:35:45,899 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:45,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 143 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-18 21:35:45,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-18 21:35:45,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2023-12-18 21:35:45,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:45,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-12-18 21:35:45,908 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2023-12-18 21:35:45,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:45,908 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-12-18 21:35:45,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 53 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 21:35:45,908 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-12-18 21:35:45,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-18 21:35:45,909 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:45,909 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:45,922 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 21:35:46,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-18 21:35:46,115 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:46,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:46,115 INFO L85 PathProgramCache]: Analyzing trace with hash 832786310, now seen corresponding path program 4 times [2023-12-18 21:35:46,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:46,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163685323] [2023-12-18 21:35:46,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:46,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:46,126 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:35:46,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529398647] [2023-12-18 21:35:46,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:35:46,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:46,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:46,127 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 21:35:46,159 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 21:35:46,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:35:46,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:46,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-18 21:35:46,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:46,216 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 21:35:46,223 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 21:35:46,286 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:35:46,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 30 [2023-12-18 21:35:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:35:46,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:35:46,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:46,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163685323] [2023-12-18 21:35:46,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:35:46,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529398647] [2023-12-18 21:35:46,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529398647] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:46,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:35:46,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2023-12-18 21:35:46,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860230644] [2023-12-18 21:35:46,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:46,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-18 21:35:46,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:46,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-18 21:35:46,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-12-18 21:35:46,460 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 21:35:46,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:46,770 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2023-12-18 21:35:46,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-18 21:35:46,771 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-18 21:35:46,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:46,772 INFO L225 Difference]: With dead ends: 46 [2023-12-18 21:35:46,772 INFO L226 Difference]: Without dead ends: 42 [2023-12-18 21:35:46,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2023-12-18 21:35:46,772 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:46,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 22 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:35:46,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-18 21:35:46,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2023-12-18 21:35:46,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:46,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-12-18 21:35:46,781 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2023-12-18 21:35:46,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:46,781 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-12-18 21:35:46,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 21:35:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-12-18 21:35:46,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-18 21:35:46,782 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:46,782 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:46,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-18 21:35:46,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:46,989 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:46,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:46,989 INFO L85 PathProgramCache]: Analyzing trace with hash 2069182600, now seen corresponding path program 10 times [2023-12-18 21:35:46,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:46,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127604768] [2023-12-18 21:35:46,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:46,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:47,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:47,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127604768] [2023-12-18 21:35:47,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127604768] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:35:47,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651238455] [2023-12-18 21:35:47,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:35:47,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:47,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:47,145 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:35:47,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-18 21:35:47,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:35:47,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:47,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 21:35:47,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:47,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:47,415 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:47,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651238455] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:47,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:35:47,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-12-18 21:35:47,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478307625] [2023-12-18 21:35:47,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:47,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-18 21:35:47,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:47,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-18 21:35:47,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-12-18 21:35:47,418 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 21:35:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:47,655 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2023-12-18 21:35:47,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-18 21:35:47,655 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-18 21:35:47,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:47,656 INFO L225 Difference]: With dead ends: 68 [2023-12-18 21:35:47,656 INFO L226 Difference]: Without dead ends: 64 [2023-12-18 21:35:47,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2023-12-18 21:35:47,657 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 45 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:47,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 33 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:35:47,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-18 21:35:47,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 30. [2023-12-18 21:35:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:47,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-12-18 21:35:47,668 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2023-12-18 21:35:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:47,669 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-12-18 21:35:47,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 21:35:47,669 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-12-18 21:35:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-18 21:35:47,669 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:47,669 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:47,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-18 21:35:47,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-18 21:35:47,876 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:47,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:47,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1208253182, now seen corresponding path program 11 times [2023-12-18 21:35:47,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:47,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396584602] [2023-12-18 21:35:47,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:47,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:48,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:48,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396584602] [2023-12-18 21:35:48,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396584602] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:35:48,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087628023] [2023-12-18 21:35:48,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:35:48,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:48,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:48,030 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:35:48,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-18 21:35:48,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-18 21:35:48,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:48,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-18 21:35:48,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:48,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:48,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087628023] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:48,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:35:48,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-12-18 21:35:48,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369488819] [2023-12-18 21:35:48,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:48,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-18 21:35:48,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:48,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-18 21:35:48,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-12-18 21:35:48,336 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:48,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:48,462 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2023-12-18 21:35:48,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-18 21:35:48,462 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-18 21:35:48,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:48,463 INFO L225 Difference]: With dead ends: 71 [2023-12-18 21:35:48,463 INFO L226 Difference]: Without dead ends: 43 [2023-12-18 21:35:48,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 42 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-12-18 21:35:48,464 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 41 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:48,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:35:48,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-18 21:35:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2023-12-18 21:35:48,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:48,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-12-18 21:35:48,478 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 29 [2023-12-18 21:35:48,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:48,478 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-12-18 21:35:48,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:48,478 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-12-18 21:35:48,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-18 21:35:48,479 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:48,479 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:48,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-18 21:35:48,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-18 21:35:48,686 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:48,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:48,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1107742850, now seen corresponding path program 12 times [2023-12-18 21:35:48,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:48,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89288024] [2023-12-18 21:35:48,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:48,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:49,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:49,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89288024] [2023-12-18 21:35:49,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89288024] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:35:49,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059087543] [2023-12-18 21:35:49,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:35:49,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:49,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:49,941 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:35:49,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-18 21:35:50,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-12-18 21:35:50,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:50,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 65 conjunts are in the unsatisfiable core [2023-12-18 21:35:50,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:50,136 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 21:35:50,367 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 21:35:50,463 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 21:35:50,588 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 21:35:50,720 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 21:35:50,893 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 21:35:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:50,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:52,081 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:52,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059087543] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:52,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:35:52,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 59 [2023-12-18 21:35:52,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466332407] [2023-12-18 21:35:52,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:52,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-12-18 21:35:52,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:52,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-12-18 21:35:52,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=3226, Unknown=0, NotChecked=0, Total=3422 [2023-12-18 21:35:52,085 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 59 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 59 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:53,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:53,411 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2023-12-18 21:35:53,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-18 21:35:53,412 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 59 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-18 21:35:53,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:53,412 INFO L225 Difference]: With dead ends: 57 [2023-12-18 21:35:53,413 INFO L226 Difference]: Without dead ends: 53 [2023-12-18 21:35:53,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=324, Invalid=4932, Unknown=0, NotChecked=0, Total=5256 [2023-12-18 21:35:53,415 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 1244 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:53,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 136 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1244 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-18 21:35:53,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-18 21:35:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2023-12-18 21:35:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 21:35:53,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-12-18 21:35:53,429 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 30 [2023-12-18 21:35:53,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:53,429 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-12-18 21:35:53,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 59 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:53,430 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-12-18 21:35:53,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-18 21:35:53,430 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:53,430 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:53,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-18 21:35:53,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:53,638 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:53,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:53,638 INFO L85 PathProgramCache]: Analyzing trace with hash -849577412, now seen corresponding path program 5 times [2023-12-18 21:35:53,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:53,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137423804] [2023-12-18 21:35:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:53,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:53,649 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:35:53,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54409709] [2023-12-18 21:35:53,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:35:53,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:53,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:53,666 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:35:53,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-18 21:35:53,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-12-18 21:35:53,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:53,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-18 21:35:53,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:53,822 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 21:35:53,839 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 21:35:53,858 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:35:53,858 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 21:35:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 21:35:53,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:54,113 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 32 treesize of output 30 [2023-12-18 21:35:54,115 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 34 treesize of output 30 [2023-12-18 21:35:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 21:35:54,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:54,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137423804] [2023-12-18 21:35:54,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:35:54,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54409709] [2023-12-18 21:35:54,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54409709] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:54,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:35:54,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2023-12-18 21:35:54,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048929138] [2023-12-18 21:35:54,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:54,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-18 21:35:54,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:54,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-18 21:35:54,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2023-12-18 21:35:54,177 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:54,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:54,408 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2023-12-18 21:35:54,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-18 21:35:54,409 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-18 21:35:54,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:54,410 INFO L225 Difference]: With dead ends: 67 [2023-12-18 21:35:54,410 INFO L226 Difference]: Without dead ends: 55 [2023-12-18 21:35:54,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2023-12-18 21:35:54,411 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:54,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 71 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 274 Invalid, 1 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:35:54,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-18 21:35:54,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-12-18 21:35:54,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 21:35:54,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2023-12-18 21:35:54,430 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 30 [2023-12-18 21:35:54,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:54,430 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2023-12-18 21:35:54,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:54,430 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2023-12-18 21:35:54,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-18 21:35:54,431 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:54,431 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:54,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-18 21:35:54,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:54,646 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:54,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:54,646 INFO L85 PathProgramCache]: Analyzing trace with hash 2008077442, now seen corresponding path program 13 times [2023-12-18 21:35:54,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:54,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954307912] [2023-12-18 21:35:54,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:54,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:54,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:54,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954307912] [2023-12-18 21:35:54,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954307912] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:35:54,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993449170] [2023-12-18 21:35:54,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:35:54,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:54,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:54,827 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:35:54,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-18 21:35:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:54,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 21:35:54,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:55,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:55,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993449170] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:55,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:35:55,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-18 21:35:55,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471698152] [2023-12-18 21:35:55,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:55,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-18 21:35:55,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:55,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-18 21:35:55,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-12-18 21:35:55,175 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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 21:35:55,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:55,459 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2023-12-18 21:35:55,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-18 21:35:55,460 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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 31 [2023-12-18 21:35:55,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:55,460 INFO L225 Difference]: With dead ends: 64 [2023-12-18 21:35:55,460 INFO L226 Difference]: Without dead ends: 60 [2023-12-18 21:35:55,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=916, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 21:35:55,461 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:55,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 26 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:35:55,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-18 21:35:55,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 37. [2023-12-18 21:35:55,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 21:35:55,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2023-12-18 21:35:55,473 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 31 [2023-12-18 21:35:55,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:55,473 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2023-12-18 21:35:55,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 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 21:35:55,474 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2023-12-18 21:35:55,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-18 21:35:55,474 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:55,474 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:55,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-18 21:35:55,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:55,681 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:55,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:55,681 INFO L85 PathProgramCache]: Analyzing trace with hash -994489144, now seen corresponding path program 14 times [2023-12-18 21:35:55,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:55,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287943437] [2023-12-18 21:35:55,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:55,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:55,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:55,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287943437] [2023-12-18 21:35:55,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287943437] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:35:55,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953027852] [2023-12-18 21:35:55,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:35:55,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:55,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:55,869 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:35:55,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-18 21:35:56,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:35:56,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:56,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 21:35:56,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:56,144 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:56,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:35:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:35:56,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953027852] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:35:56,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:35:56,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-18 21:35:56,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761829906] [2023-12-18 21:35:56,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:35:56,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-18 21:35:56,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:35:56,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-18 21:35:56,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-12-18 21:35:56,241 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 21:35:56,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:35:56,388 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2023-12-18 21:35:56,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-18 21:35:56,389 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 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 33 [2023-12-18 21:35:56,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:35:56,389 INFO L225 Difference]: With dead ends: 72 [2023-12-18 21:35:56,389 INFO L226 Difference]: Without dead ends: 43 [2023-12-18 21:35:56,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 47 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-12-18 21:35:56,390 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 37 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:35:56,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 27 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:35:56,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-18 21:35:56,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2023-12-18 21:35:56,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:35:56,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2023-12-18 21:35:56,403 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2023-12-18 21:35:56,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:35:56,403 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2023-12-18 21:35:56,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 21:35:56,404 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2023-12-18 21:35:56,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-18 21:35:56,404 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:35:56,404 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:35:56,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-18 21:35:56,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-18 21:35:56,628 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:35:56,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:35:56,628 INFO L85 PathProgramCache]: Analyzing trace with hash -425371324, now seen corresponding path program 15 times [2023-12-18 21:35:56,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:35:56,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873821202] [2023-12-18 21:35:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:35:56,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:35:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:35:58,032 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 21:35:58,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:35:58,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873821202] [2023-12-18 21:35:58,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873821202] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:35:58,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757326005] [2023-12-18 21:35:58,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:35:58,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:35:58,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:35:58,034 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:35:58,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-18 21:35:58,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-18 21:35:58,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:35:58,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-18 21:35:58,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:35:58,185 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 21:35:58,401 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 21:35:58,500 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 21:35:58,649 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 21:35:58,802 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 21:35:59,051 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 21:35:59,208 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 21:35:59,276 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 21:35:59,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:36:00,580 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 21:36:00,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757326005] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:36:00,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:36:00,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 23] total 68 [2023-12-18 21:36:00,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751921527] [2023-12-18 21:36:00,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:36:00,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-12-18 21:36:00,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:36:00,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-12-18 21:36:00,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=4328, Unknown=0, NotChecked=0, Total=4556 [2023-12-18 21:36:00,586 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 68 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 68 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 21:36:02,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:36:02,139 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2023-12-18 21:36:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-18 21:36:02,140 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 68 states have internal predecessors, (92), 0 states have call successors, (0), 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 21:36:02,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:36:02,140 INFO L225 Difference]: With dead ends: 67 [2023-12-18 21:36:02,140 INFO L226 Difference]: Without dead ends: 63 [2023-12-18 21:36:02,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=373, Invalid=6599, Unknown=0, NotChecked=0, Total=6972 [2023-12-18 21:36:02,142 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-18 21:36:02,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 165 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1570 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-18 21:36:02,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-18 21:36:02,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2023-12-18 21:36:02,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:02,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2023-12-18 21:36:02,162 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 34 [2023-12-18 21:36:02,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:36:02,162 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2023-12-18 21:36:02,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 68 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 21:36:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2023-12-18 21:36:02,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-18 21:36:02,162 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:36:02,162 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:36:02,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-18 21:36:02,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-18 21:36:02,372 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:36:02,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:36:02,373 INFO L85 PathProgramCache]: Analyzing trace with hash 37411912, now seen corresponding path program 16 times [2023-12-18 21:36:02,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:36:02,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114192822] [2023-12-18 21:36:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:36:02,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:36:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:36:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:02,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:36:02,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114192822] [2023-12-18 21:36:02,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114192822] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:36:02,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255266222] [2023-12-18 21:36:02,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:36:02,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:02,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:36:02,539 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:36:02,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-18 21:36:02,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:36:02,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:36:02,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 21:36:02,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:36:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:02,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:36:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:02,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255266222] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:36:02,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:36:02,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-12-18 21:36:02,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922320768] [2023-12-18 21:36:02,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:36:02,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-18 21:36:02,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:36:02,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-18 21:36:02,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-12-18 21:36:02,915 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:03,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:36:03,203 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2023-12-18 21:36:03,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 21:36:03,203 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-18 21:36:03,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:36:03,204 INFO L225 Difference]: With dead ends: 77 [2023-12-18 21:36:03,204 INFO L226 Difference]: Without dead ends: 73 [2023-12-18 21:36:03,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2023-12-18 21:36:03,205 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 59 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:36:03,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 29 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:36:03,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-18 21:36:03,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 38. [2023-12-18 21:36:03,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:03,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2023-12-18 21:36:03,219 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 35 [2023-12-18 21:36:03,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:36:03,219 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2023-12-18 21:36:03,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:03,219 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2023-12-18 21:36:03,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-18 21:36:03,220 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:36:03,220 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:36:03,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-18 21:36:03,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:03,426 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:36:03,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:36:03,427 INFO L85 PathProgramCache]: Analyzing trace with hash -544570046, now seen corresponding path program 17 times [2023-12-18 21:36:03,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:36:03,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480092112] [2023-12-18 21:36:03,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:36:03,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:36:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:36:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 54 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:03,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:36:03,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480092112] [2023-12-18 21:36:03,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480092112] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:36:03,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228033724] [2023-12-18 21:36:03,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:36:03,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:03,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:36:03,585 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:36:03,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-18 21:36:03,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-18 21:36:03,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:36:03,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-18 21:36:03,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:36:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 70 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:03,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:36:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 70 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:03,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228033724] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:36:03,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:36:03,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-12-18 21:36:03,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560525930] [2023-12-18 21:36:03,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:36:03,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-18 21:36:03,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:36:03,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-18 21:36:03,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-12-18 21:36:03,922 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 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 21:36:04,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:36:04,102 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2023-12-18 21:36:04,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-18 21:36:04,103 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 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) Word has length 37 [2023-12-18 21:36:04,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:36:04,103 INFO L225 Difference]: With dead ends: 85 [2023-12-18 21:36:04,103 INFO L226 Difference]: Without dead ends: 51 [2023-12-18 21:36:04,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 52 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-12-18 21:36:04,104 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 72 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:36:04,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 27 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:36:04,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-18 21:36:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2023-12-18 21:36:04,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2023-12-18 21:36:04,127 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 37 [2023-12-18 21:36:04,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:36:04,127 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2023-12-18 21:36:04,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 26 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 21:36:04,127 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2023-12-18 21:36:04,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-18 21:36:04,127 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:36:04,127 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:36:04,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-18 21:36:04,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:04,347 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:36:04,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:36:04,347 INFO L85 PathProgramCache]: Analyzing trace with hash -614206530, now seen corresponding path program 18 times [2023-12-18 21:36:04,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:36:04,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107263500] [2023-12-18 21:36:04,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:36:04,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:36:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:36:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:05,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:36:05,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107263500] [2023-12-18 21:36:05,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107263500] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:36:05,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980025378] [2023-12-18 21:36:05,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:36:05,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:05,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:36:05,920 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:36:05,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-18 21:36:06,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-12-18 21:36:06,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:36:06,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 88 conjunts are in the unsatisfiable core [2023-12-18 21:36:06,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:36:06,164 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 21:36:06,412 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 21:36:06,528 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 21:36:06,651 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 21:36:06,769 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 21:36:06,908 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 21:36:07,062 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 21:36:07,235 INFO L349 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2023-12-18 21:36:07,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 22 [2023-12-18 21:36:07,243 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 21:36:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:07,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:36:08,589 INFO L349 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2023-12-18 21:36:08,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 86 treesize of output 29 [2023-12-18 21:36:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:09,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980025378] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:36:09,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:36:09,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 28, 28] total 83 [2023-12-18 21:36:09,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518525470] [2023-12-18 21:36:09,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:36:09,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-12-18 21:36:09,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:36:09,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-12-18 21:36:09,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=6511, Unknown=0, NotChecked=0, Total=6806 [2023-12-18 21:36:09,058 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 83 states, 83 states have (on average 1.2650602409638554) internal successors, (105), 83 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:11,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:36:11,225 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2023-12-18 21:36:11,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-18 21:36:11,226 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.2650602409638554) internal successors, (105), 83 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-18 21:36:11,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:36:11,226 INFO L225 Difference]: With dead ends: 69 [2023-12-18 21:36:11,226 INFO L226 Difference]: Without dead ends: 65 [2023-12-18 21:36:11,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3180 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=510, Invalid=9792, Unknown=0, NotChecked=0, Total=10302 [2023-12-18 21:36:11,229 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 2357 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 2384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:36:11,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 209 Invalid, 2384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2357 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-18 21:36:11,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-18 21:36:11,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2023-12-18 21:36:11,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.105263157894737) internal successors, (63), 57 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 21:36:11,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2023-12-18 21:36:11,252 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 38 [2023-12-18 21:36:11,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:36:11,252 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2023-12-18 21:36:11,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.2650602409638554) internal successors, (105), 83 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:11,253 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2023-12-18 21:36:11,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-18 21:36:11,253 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:36:11,253 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:36:11,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-18 21:36:11,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-18 21:36:11,460 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:36:11,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:36:11,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1522029762, now seen corresponding path program 19 times [2023-12-18 21:36:11,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:36:11,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164138578] [2023-12-18 21:36:11,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:36:11,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:36:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:36:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:11,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:36:11,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164138578] [2023-12-18 21:36:11,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164138578] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:36:11,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182920428] [2023-12-18 21:36:11,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:36:11,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:11,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:36:11,645 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:36:11,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-18 21:36:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:36:11,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-18 21:36:11,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:36:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 28 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:11,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:36:12,030 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 28 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:12,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182920428] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:36:12,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:36:12,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-12-18 21:36:12,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296801496] [2023-12-18 21:36:12,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:36:12,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-18 21:36:12,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:36:12,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-18 21:36:12,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-12-18 21:36:12,031 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 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 21:36:12,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:36:12,332 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2023-12-18 21:36:12,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-18 21:36:12,332 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 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) Word has length 39 [2023-12-18 21:36:12,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:36:12,333 INFO L225 Difference]: With dead ends: 89 [2023-12-18 21:36:12,333 INFO L226 Difference]: Without dead ends: 85 [2023-12-18 21:36:12,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 52 SyntacticMatches, 16 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=440, Invalid=1540, Unknown=0, NotChecked=0, Total=1980 [2023-12-18 21:36:12,334 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 48 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:36:12,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 30 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:36:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-18 21:36:12,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 42. [2023-12-18 21:36:12,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2023-12-18 21:36:12,350 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 39 [2023-12-18 21:36:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:36:12,350 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2023-12-18 21:36:12,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 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 21:36:12,350 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2023-12-18 21:36:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-18 21:36:12,350 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:36:12,350 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:36:12,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-18 21:36:12,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-18 21:36:12,555 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:36:12,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:36:12,556 INFO L85 PathProgramCache]: Analyzing trace with hash 272965768, now seen corresponding path program 20 times [2023-12-18 21:36:12,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:36:12,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320782218] [2023-12-18 21:36:12,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:36:12,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:36:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:36:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:12,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:36:12,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320782218] [2023-12-18 21:36:12,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320782218] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:36:12,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757851294] [2023-12-18 21:36:12,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:36:12,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:12,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:36:12,785 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:36:12,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-18 21:36:12,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:36:12,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:36:12,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-18 21:36:12,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:36:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 92 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:13,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:36:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 92 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:13,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757851294] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:36:13,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:36:13,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-12-18 21:36:13,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91215282] [2023-12-18 21:36:13,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:36:13,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-18 21:36:13,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:36:13,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-18 21:36:13,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-12-18 21:36:13,301 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:36:13,511 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2023-12-18 21:36:13,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-18 21:36:13,511 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-12-18 21:36:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:36:13,512 INFO L225 Difference]: With dead ends: 92 [2023-12-18 21:36:13,512 INFO L226 Difference]: Without dead ends: 55 [2023-12-18 21:36:13,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 57 SyntacticMatches, 15 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2023-12-18 21:36:13,513 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 75 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:36:13,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 37 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:36:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-18 21:36:13,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2023-12-18 21:36:13,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 21:36:13,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2023-12-18 21:36:13,528 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 41 [2023-12-18 21:36:13,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:36:13,528 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2023-12-18 21:36:13,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:13,529 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2023-12-18 21:36:13,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-18 21:36:13,529 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:36:13,529 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:36:13,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-18 21:36:13,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-18 21:36:13,734 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:36:13,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:36:13,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1937051388, now seen corresponding path program 21 times [2023-12-18 21:36:13,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:36:13,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372029495] [2023-12-18 21:36:13,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:36:13,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:36:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:36:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:15,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:36:15,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372029495] [2023-12-18 21:36:15,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372029495] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:36:15,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288723544] [2023-12-18 21:36:15,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:36:15,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:15,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:36:15,392 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:36:15,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-18 21:36:15,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-12-18 21:36:15,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:36:15,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 98 conjunts are in the unsatisfiable core [2023-12-18 21:36:15,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:36:15,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:36:15,995 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 21:36:16,114 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 21:36:16,241 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 19 treesize of output 11 [2023-12-18 21:36:16,389 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 21:36:16,562 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 21:36:16,748 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 21:36:16,948 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 21:36:17,196 INFO L349 Elim1Store]: treesize reduction 224, result has 0.4 percent of original size [2023-12-18 21:36:17,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 89 treesize of output 25 [2023-12-18 21:36:17,199 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 21:36:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:17,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:36:18,939 INFO L349 Elim1Store]: treesize reduction 238, result has 0.4 percent of original size [2023-12-18 21:36:18,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 98 treesize of output 33 [2023-12-18 21:36:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:19,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288723544] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:36:19,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:36:19,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 31, 31] total 93 [2023-12-18 21:36:19,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152706645] [2023-12-18 21:36:19,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:36:19,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2023-12-18 21:36:19,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:36:19,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2023-12-18 21:36:19,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=8226, Unknown=0, NotChecked=0, Total=8556 [2023-12-18 21:36:19,607 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 93 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 93 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 21:36:22,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:36:22,046 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2023-12-18 21:36:22,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-18 21:36:22,046 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 93 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-18 21:36:22,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:36:22,046 INFO L225 Difference]: With dead ends: 76 [2023-12-18 21:36:22,046 INFO L226 Difference]: Without dead ends: 72 [2023-12-18 21:36:22,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4029 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=569, Invalid=12313, Unknown=0, NotChecked=0, Total=12882 [2023-12-18 21:36:22,048 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 2558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-18 21:36:22,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 196 Invalid, 2558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-18 21:36:22,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-18 21:36:22,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2023-12-18 21:36:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 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 21:36:22,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2023-12-18 21:36:22,069 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 42 [2023-12-18 21:36:22,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:36:22,069 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2023-12-18 21:36:22,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 93 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 21:36:22,069 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2023-12-18 21:36:22,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-18 21:36:22,069 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:36:22,069 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:36:22,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-18 21:36:22,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-18 21:36:22,276 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:36:22,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:36:22,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1678885950, now seen corresponding path program 6 times [2023-12-18 21:36:22,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:36:22,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989504338] [2023-12-18 21:36:22,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:36:22,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:36:22,289 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:36:22,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199226457] [2023-12-18 21:36:22,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:36:22,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:22,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:36:22,309 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:36:22,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-18 21:36:22,575 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-12-18 21:36:22,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:36:22,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-18 21:36:22,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:36:22,623 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 21:36:22,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:22,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-18 21:36:22,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:22,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:22,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:22,672 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:22,672 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 30 treesize of output 32 [2023-12-18 21:36:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 46 proven. 75 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 21:36:24,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:36:24,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-12-18 21:36:24,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-12-18 21:36:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 47 proven. 73 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:36:24,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:36:24,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989504338] [2023-12-18 21:36:24,395 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:36:24,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199226457] [2023-12-18 21:36:24,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199226457] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:36:24,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:36:24,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2023-12-18 21:36:24,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464485212] [2023-12-18 21:36:24,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:36:24,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-18 21:36:24,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:36:24,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-18 21:36:24,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=878, Unknown=1, NotChecked=0, Total=992 [2023-12-18 21:36:24,396 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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 21:36:24,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:36:24,765 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2023-12-18 21:36:24,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-18 21:36:24,765 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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 42 [2023-12-18 21:36:24,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:36:24,769 INFO L225 Difference]: With dead ends: 78 [2023-12-18 21:36:24,769 INFO L226 Difference]: Without dead ends: 66 [2023-12-18 21:36:24,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=137, Invalid=1052, Unknown=1, NotChecked=0, Total=1190 [2023-12-18 21:36:24,770 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:36:24,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 97 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:36:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-12-18 21:36:24,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2023-12-18 21:36:24,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.09375) internal successors, (70), 64 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:24,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2023-12-18 21:36:24,797 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 42 [2023-12-18 21:36:24,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:36:24,797 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2023-12-18 21:36:24,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 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 21:36:24,797 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2023-12-18 21:36:24,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-18 21:36:24,798 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:36:24,798 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:36:24,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-18 21:36:25,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:25,000 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:36:25,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:36:25,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1728106488, now seen corresponding path program 22 times [2023-12-18 21:36:25,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:36:25,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161909203] [2023-12-18 21:36:25,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:36:25,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:36:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:36:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 28 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:25,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:36:25,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161909203] [2023-12-18 21:36:25,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161909203] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:36:25,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071034473] [2023-12-18 21:36:25,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:36:25,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:25,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:36:25,333 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:36:25,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-18 21:36:25,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:36:25,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:36:25,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-18 21:36:25,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:36:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:25,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:36:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 36 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:25,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071034473] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:36:25,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:36:25,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-12-18 21:36:25,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107238550] [2023-12-18 21:36:25,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:36:25,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-18 21:36:25,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:36:25,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-18 21:36:25,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-12-18 21:36:25,947 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:26,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:36:26,372 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2023-12-18 21:36:26,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-18 21:36:26,373 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-12-18 21:36:26,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:36:26,373 INFO L225 Difference]: With dead ends: 96 [2023-12-18 21:36:26,373 INFO L226 Difference]: Without dead ends: 92 [2023-12-18 21:36:26,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 57 SyntacticMatches, 18 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=538, Invalid=1912, Unknown=0, NotChecked=0, Total=2450 [2023-12-18 21:36:26,375 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 65 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:36:26,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 31 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:36:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-18 21:36:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 46. [2023-12-18 21:36:26,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 21:36:26,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2023-12-18 21:36:26,399 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 43 [2023-12-18 21:36:26,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:36:26,399 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2023-12-18 21:36:26,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 32 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:26,400 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2023-12-18 21:36:26,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-18 21:36:26,400 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:36:26,400 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:36:26,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-18 21:36:26,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:26,606 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:36:26,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:36:26,607 INFO L85 PathProgramCache]: Analyzing trace with hash 2021709186, now seen corresponding path program 23 times [2023-12-18 21:36:26,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:36:26,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685710905] [2023-12-18 21:36:26,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:36:26,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:36:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:36:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 95 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:26,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:36:26,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685710905] [2023-12-18 21:36:26,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685710905] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:36:26,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140510575] [2023-12-18 21:36:26,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:36:26,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:26,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:36:26,885 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:36:26,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-18 21:36:27,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-12-18 21:36:27,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:36:27,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-18 21:36:27,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:36:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 117 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:27,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:36:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 117 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:27,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140510575] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:36:27,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:36:27,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-12-18 21:36:27,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487276166] [2023-12-18 21:36:27,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:36:27,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-18 21:36:27,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:36:27,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-18 21:36:27,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-12-18 21:36:27,508 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:27,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:36:27,753 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2023-12-18 21:36:27,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-18 21:36:27,753 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-12-18 21:36:27,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:36:27,754 INFO L225 Difference]: With dead ends: 99 [2023-12-18 21:36:27,754 INFO L226 Difference]: Without dead ends: 59 [2023-12-18 21:36:27,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 62 SyntacticMatches, 17 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 21:36:27,755 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 96 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:36:27,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 25 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:36:27,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-18 21:36:27,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2023-12-18 21:36:27,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-12-18 21:36:27,778 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 45 [2023-12-18 21:36:27,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:36:27,778 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-12-18 21:36:27,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:27,778 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-12-18 21:36:27,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-18 21:36:27,778 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:36:27,779 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:36:27,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-12-18 21:36:27,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-18 21:36:27,985 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:36:27,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:36:27,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1003354114, now seen corresponding path program 24 times [2023-12-18 21:36:27,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:36:27,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189090164] [2023-12-18 21:36:27,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:36:27,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:36:28,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:36:29,981 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:29,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:36:29,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189090164] [2023-12-18 21:36:29,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189090164] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-18 21:36:29,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439052212] [2023-12-18 21:36:29,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:36:29,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:29,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:36:29,984 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:36:29,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-18 21:36:30,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-12-18 21:36:30,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:36:30,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 105 conjunts are in the unsatisfiable core [2023-12-18 21:36:30,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:36:30,313 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 21:36:30,453 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 21:36:30,593 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 21:36:30,739 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 21:36:30,893 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 21:36:31,067 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 21:36:31,257 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 21:36:31,489 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 21:36:31,749 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 21:36:32,029 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 21:36:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-18 21:36:32,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:36:34,955 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:34,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 117 treesize of output 37 [2023-12-18 21:36:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 84 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-18 21:36:35,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439052212] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:36:35,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-18 21:36:35,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 33, 33] total 101 [2023-12-18 21:36:35,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385799787] [2023-12-18 21:36:35,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-18 21:36:35,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-12-18 21:36:35,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:36:35,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-12-18 21:36:35,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=656, Invalid=9444, Unknown=0, NotChecked=0, Total=10100 [2023-12-18 21:36:35,031 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 101 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 101 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 21:36:41,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:36:41,299 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2023-12-18 21:36:41,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-12-18 21:36:41,300 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 101 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-12-18 21:36:41,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:36:41,300 INFO L225 Difference]: With dead ends: 109 [2023-12-18 21:36:41,300 INFO L226 Difference]: Without dead ends: 91 [2023-12-18 21:36:41,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6955 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1954, Invalid=27802, Unknown=0, NotChecked=0, Total=29756 [2023-12-18 21:36:41,317 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 2556 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-18 21:36:41,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 166 Invalid, 2640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2556 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-18 21:36:41,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-18 21:36:41,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2023-12-18 21:36:41,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 74 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:41,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2023-12-18 21:36:41,353 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 46 [2023-12-18 21:36:41,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:36:41,353 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2023-12-18 21:36:41,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0891089108910892) internal successors, (110), 101 states have internal predecessors, (110), 0 states have call successors, (0), 0 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 21:36:41,353 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2023-12-18 21:36:41,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-18 21:36:41,354 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:36:41,354 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:36:41,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-18 21:36:41,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:41,558 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:36:41,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:36:41,559 INFO L85 PathProgramCache]: Analyzing trace with hash -745188676, now seen corresponding path program 7 times [2023-12-18 21:36:41,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:36:41,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105079271] [2023-12-18 21:36:41,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:36:41,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:36:41,581 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:36:41,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261106312] [2023-12-18 21:36:41,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:36:41,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:41,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:36:41,583 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:36:41,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-18 21:36:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:36:41,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-18 21:36:41,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:36:41,782 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 21:36:41,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:41,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-18 21:36:41,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:41,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:41,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:41,823 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:41,823 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 30 treesize of output 32 [2023-12-18 21:36:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 54 proven. 101 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-18 21:36:42,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:36:42,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-12-18 21:36:42,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-12-18 21:36:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 55 proven. 99 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-18 21:36:42,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:36:42,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105079271] [2023-12-18 21:36:42,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:36:42,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261106312] [2023-12-18 21:36:42,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261106312] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:36:42,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:36:42,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2023-12-18 21:36:42,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082461085] [2023-12-18 21:36:42,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:36:42,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-18 21:36:42,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:36:42,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-18 21:36:42,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1132, Unknown=0, NotChecked=0, Total=1260 [2023-12-18 21:36:42,653 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:43,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:36:43,154 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2023-12-18 21:36:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-18 21:36:43,154 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-12-18 21:36:43,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:36:43,154 INFO L225 Difference]: With dead ends: 91 [2023-12-18 21:36:43,155 INFO L226 Difference]: Without dead ends: 79 [2023-12-18 21:36:43,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=1330, Unknown=0, NotChecked=0, Total=1482 [2023-12-18 21:36:43,155 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-18 21:36:43,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 128 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-18 21:36:43,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-18 21:36:43,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2023-12-18 21:36:43,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 77 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 21:36:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2023-12-18 21:36:43,191 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 46 [2023-12-18 21:36:43,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:36:43,191 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2023-12-18 21:36:43,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:43,191 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2023-12-18 21:36:43,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-18 21:36:43,192 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:36:43,192 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:36:43,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-18 21:36:43,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:43,397 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:36:43,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:36:43,397 INFO L85 PathProgramCache]: Analyzing trace with hash -447811834, now seen corresponding path program 8 times [2023-12-18 21:36:43,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:36:43,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943678683] [2023-12-18 21:36:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:36:43,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:36:43,407 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:36:43,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098968526] [2023-12-18 21:36:43,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:36:43,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:43,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:36:43,409 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:36:43,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-18 21:36:43,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:36:43,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:36:43,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-18 21:36:43,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:36:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 145 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:43,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:36:43,885 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 145 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:43,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:36:43,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943678683] [2023-12-18 21:36:43,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:36:43,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098968526] [2023-12-18 21:36:43,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098968526] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:36:43,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:36:43,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2023-12-18 21:36:43,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343995234] [2023-12-18 21:36:43,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:36:43,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-18 21:36:43,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:36:43,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-18 21:36:43,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2023-12-18 21:36:43,887 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:44,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:36:44,165 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2023-12-18 21:36:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-18 21:36:44,166 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-12-18 21:36:44,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:36:44,166 INFO L225 Difference]: With dead ends: 119 [2023-12-18 21:36:44,166 INFO L226 Difference]: Without dead ends: 73 [2023-12-18 21:36:44,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=473, Invalid=1419, Unknown=0, NotChecked=0, Total=1892 [2023-12-18 21:36:44,167 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 111 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:36:44,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 25 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:36:44,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-18 21:36:44,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 51. [2023-12-18 21:36:44,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.1) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 21:36:44,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2023-12-18 21:36:44,190 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 49 [2023-12-18 21:36:44,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:36:44,190 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2023-12-18 21:36:44,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 33 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:44,204 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2023-12-18 21:36:44,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-18 21:36:44,204 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:36:44,204 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:36:44,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-18 21:36:44,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-12-18 21:36:44,410 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:36:44,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:36:44,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1209367678, now seen corresponding path program 9 times [2023-12-18 21:36:44,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:36:44,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614150731] [2023-12-18 21:36:44,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:36:44,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:36:44,421 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:36:44,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502077698] [2023-12-18 21:36:44,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:36:44,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:44,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:36:44,423 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:36:44,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-18 21:36:44,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-12-18 21:36:44,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:36:44,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-18 21:36:44,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:36:44,637 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 21:36:44,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-12-18 21:36:44,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:44,656 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 40 treesize of output 42 [2023-12-18 21:36:44,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:44,799 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 48 treesize of output 43 [2023-12-18 21:36:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 77 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-12-18 21:36:44,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:36:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 24 proven. 78 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-12-18 21:36:45,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:36:45,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614150731] [2023-12-18 21:36:45,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:36:45,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502077698] [2023-12-18 21:36:45,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502077698] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:36:45,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:36:45,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2023-12-18 21:36:45,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358292908] [2023-12-18 21:36:45,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:36:45,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-18 21:36:45,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:36:45,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-18 21:36:45,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2023-12-18 21:36:45,125 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 21:36:45,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:36:45,586 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2023-12-18 21:36:45,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-18 21:36:45,587 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-12-18 21:36:45,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:36:45,587 INFO L225 Difference]: With dead ends: 58 [2023-12-18 21:36:45,587 INFO L226 Difference]: Without dead ends: 54 [2023-12-18 21:36:45,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2023-12-18 21:36:45,588 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 21:36:45,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 21 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 21:36:45,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-18 21:36:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-12-18 21:36:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 21:36:45,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2023-12-18 21:36:45,614 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 50 [2023-12-18 21:36:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:36:45,614 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2023-12-18 21:36:45,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 21:36:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2023-12-18 21:36:45,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-18 21:36:45,615 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:36:45,615 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:36:45,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-18 21:36:45,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-12-18 21:36:45,821 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:36:45,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:36:45,821 INFO L85 PathProgramCache]: Analyzing trace with hash -547796412, now seen corresponding path program 10 times [2023-12-18 21:36:45,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:36:45,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985966020] [2023-12-18 21:36:45,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:36:45,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:36:45,836 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:36:45,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281075876] [2023-12-18 21:36:45,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:36:45,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:45,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:36:45,838 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:36:45,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-18 21:36:46,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:36:46,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:36:46,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-18 21:36:46,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:36:46,009 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 21:36:46,015 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 21:36:46,028 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:46,028 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 21:36:46,046 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:46,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 57 [2023-12-18 21:36:46,251 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:46,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 56 [2023-12-18 21:36:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 31 proven. 109 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-18 21:36:46,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:36:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-18 21:36:46,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:36:46,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985966020] [2023-12-18 21:36:46,627 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:36:46,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281075876] [2023-12-18 21:36:46,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281075876] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:36:46,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:36:46,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2023-12-18 21:36:46,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505631369] [2023-12-18 21:36:46,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:36:46,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-18 21:36:46,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:36:46,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-18 21:36:46,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-12-18 21:36:46,628 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:47,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:36:47,295 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2023-12-18 21:36:47,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-18 21:36:47,295 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-12-18 21:36:47,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:36:47,296 INFO L225 Difference]: With dead ends: 61 [2023-12-18 21:36:47,296 INFO L226 Difference]: Without dead ends: 57 [2023-12-18 21:36:47,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 21:36:47,296 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:36:47,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 31 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:36:47,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-18 21:36:47,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-12-18 21:36:47,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.125) internal successors, (63), 56 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 21:36:47,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2023-12-18 21:36:47,325 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 53 [2023-12-18 21:36:47,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:36:47,325 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2023-12-18 21:36:47,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:47,325 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2023-12-18 21:36:47,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-18 21:36:47,325 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:36:47,326 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:36:47,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-12-18 21:36:47,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-12-18 21:36:47,532 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:36:47,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:36:47,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1283132350, now seen corresponding path program 11 times [2023-12-18 21:36:47,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:36:47,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494573664] [2023-12-18 21:36:47,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:36:47,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:36:47,557 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:36:47,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155518620] [2023-12-18 21:36:47,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:36:47,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:47,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:36:47,558 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:36:47,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-18 21:36:48,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-12-18 21:36:48,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:36:48,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-18 21:36:48,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:36:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 210 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:48,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:36:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 210 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:48,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:36:48,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494573664] [2023-12-18 21:36:48,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:36:48,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155518620] [2023-12-18 21:36:48,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155518620] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:36:48,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:36:48,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 40 [2023-12-18 21:36:48,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936052502] [2023-12-18 21:36:48,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:36:48,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-18 21:36:48,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:36:48,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-18 21:36:48,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2023-12-18 21:36:48,432 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 40 states, 40 states have (on average 2.35) internal successors, (94), 40 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 21:36:48,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:36:48,953 INFO L93 Difference]: Finished difference Result 239 states and 283 transitions. [2023-12-18 21:36:48,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-18 21:36:48,953 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 40 states have internal predecessors, (94), 0 states have call successors, (0), 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 56 [2023-12-18 21:36:48,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:36:48,954 INFO L225 Difference]: With dead ends: 239 [2023-12-18 21:36:48,954 INFO L226 Difference]: Without dead ends: 110 [2023-12-18 21:36:48,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 62 SyntacticMatches, 10 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=888, Invalid=3144, Unknown=0, NotChecked=0, Total=4032 [2023-12-18 21:36:48,955 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 303 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:36:48,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 29 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:36:48,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-12-18 21:36:48,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 59. [2023-12-18 21:36:48,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 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 21:36:48,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2023-12-18 21:36:48,985 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 56 [2023-12-18 21:36:48,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:36:48,985 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2023-12-18 21:36:48,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 40 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 21:36:48,985 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2023-12-18 21:36:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-18 21:36:48,985 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:36:48,985 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:36:48,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-12-18 21:36:49,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:49,189 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:36:49,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:36:49,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1267075902, now seen corresponding path program 12 times [2023-12-18 21:36:49,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:36:49,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153205638] [2023-12-18 21:36:49,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:36:49,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:36:49,207 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:36:49,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446005972] [2023-12-18 21:36:49,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:36:49,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:49,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:36:49,209 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:36:49,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-18 21:36:49,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-12-18 21:36:49,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:36:49,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-18 21:36:49,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:36:49,724 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 21:36:49,729 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 21:36:49,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:49,741 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 21:36:49,756 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:49,757 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 21:36:49,781 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:49,781 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 64 treesize of output 72 [2023-12-18 21:36:49,978 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:49,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 72 treesize of output 69 [2023-12-18 21:36:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 46 proven. 144 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-12-18 21:36:50,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:36:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 40 proven. 150 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-12-18 21:36:50,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:36:50,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153205638] [2023-12-18 21:36:50,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:36:50,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446005972] [2023-12-18 21:36:50,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446005972] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:36:50,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:36:50,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2023-12-18 21:36:50,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131671605] [2023-12-18 21:36:50,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:36:50,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-18 21:36:50,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:36:50,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-18 21:36:50,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2023-12-18 21:36:50,503 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 21:36:51,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:36:51,622 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2023-12-18 21:36:51,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-18 21:36:51,623 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 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 21:36:51,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:36:51,623 INFO L225 Difference]: With dead ends: 66 [2023-12-18 21:36:51,623 INFO L226 Difference]: Without dead ends: 62 [2023-12-18 21:36:51,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=335, Invalid=1305, Unknown=0, NotChecked=0, Total=1640 [2023-12-18 21:36:51,624 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:36:51,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 40 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:36:51,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-18 21:36:51,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-12-18 21:36:51,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 21:36:51,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2023-12-18 21:36:51,693 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 58 [2023-12-18 21:36:51,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:36:51,694 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2023-12-18 21:36:51,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 21:36:51,694 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2023-12-18 21:36:51,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-18 21:36:51,694 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:36:51,694 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:36:51,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-12-18 21:36:51,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-18 21:36:51,899 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:36:51,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:36:51,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1746579196, now seen corresponding path program 13 times [2023-12-18 21:36:51,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:36:51,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438056933] [2023-12-18 21:36:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:36:51,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:36:51,915 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:36:51,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564779117] [2023-12-18 21:36:51,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:36:51,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:51,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:36:51,916 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:36:51,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-18 21:36:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:36:52,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-18 21:36:52,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:36:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 247 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:52,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:36:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 247 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:36:52,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:36:52,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438056933] [2023-12-18 21:36:52,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:36:52,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564779117] [2023-12-18 21:36:52,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564779117] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:36:52,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:36:52,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 42 [2023-12-18 21:36:52,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460199035] [2023-12-18 21:36:52,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:36:52,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-18 21:36:52,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:36:52,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-18 21:36:52,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2023-12-18 21:36:52,815 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 42 states, 42 states have (on average 2.357142857142857) internal successors, (99), 42 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:53,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:36:53,292 INFO L93 Difference]: Finished difference Result 235 states and 285 transitions. [2023-12-18 21:36:53,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-18 21:36:53,293 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.357142857142857) internal successors, (99), 42 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-12-18 21:36:53,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:36:53,293 INFO L225 Difference]: With dead ends: 235 [2023-12-18 21:36:53,293 INFO L226 Difference]: Without dead ends: 133 [2023-12-18 21:36:53,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 66 SyntacticMatches, 14 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=749, Invalid=2331, Unknown=0, NotChecked=0, Total=3080 [2023-12-18 21:36:53,294 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 157 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-18 21:36:53,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 26 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-18 21:36:53,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-12-18 21:36:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 63. [2023-12-18 21:36:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2023-12-18 21:36:53,330 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 61 [2023-12-18 21:36:53,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:36:53,330 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2023-12-18 21:36:53,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.357142857142857) internal successors, (99), 42 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:53,330 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2023-12-18 21:36:53,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-18 21:36:53,330 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:36:53,330 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:36:53,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-12-18 21:36:53,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-18 21:36:53,536 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:36:53,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:36:53,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1590031488, now seen corresponding path program 14 times [2023-12-18 21:36:53,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:36:53,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710366897] [2023-12-18 21:36:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:36:53,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:36:53,550 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:36:53,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506834369] [2023-12-18 21:36:53,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:36:53,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:53,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:36:53,552 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:36:53,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-18 21:36:53,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:36:53,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:36:53,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-18 21:36:53,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:36:53,802 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 21:36:53,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-18 21:36:53,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,859 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:53,859 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 30 treesize of output 32 [2023-12-18 21:36:53,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,910 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:53,910 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 39 treesize of output 44 [2023-12-18 21:36:53,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:53,982 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:53,982 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 48 treesize of output 56 [2023-12-18 21:36:54,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:54,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:54,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:54,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:54,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:54,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:54,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:54,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:54,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:54,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:54,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:54,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:54,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:54,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:54,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:36:54,067 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:54,067 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 57 treesize of output 68 [2023-12-18 21:36:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 140 proven. 158 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-18 21:36:56,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:36:57,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-12-18 21:36:57,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-12-18 21:36:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 135 proven. 153 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-12-18 21:36:57,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:36:57,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710366897] [2023-12-18 21:36:57,527 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:36:57,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506834369] [2023-12-18 21:36:57,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506834369] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:36:57,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:36:57,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 43 [2023-12-18 21:36:57,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888066780] [2023-12-18 21:36:57,528 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:36:57,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-12-18 21:36:57,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:36:57,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-12-18 21:36:57,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1640, Unknown=2, NotChecked=0, Total=1806 [2023-12-18 21:36:57,529 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 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 21:36:58,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:36:58,278 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2023-12-18 21:36:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-18 21:36:58,278 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 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 62 [2023-12-18 21:36:58,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:36:58,279 INFO L225 Difference]: With dead ends: 88 [2023-12-18 21:36:58,279 INFO L226 Difference]: Without dead ends: 67 [2023-12-18 21:36:58,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=191, Invalid=1877, Unknown=2, NotChecked=0, Total=2070 [2023-12-18 21:36:58,281 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-18 21:36:58,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 140 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-18 21:36:58,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-18 21:36:58,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2023-12-18 21:36:58,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.123076923076923) internal successors, (73), 65 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:36:58,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2023-12-18 21:36:58,340 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 62 [2023-12-18 21:36:58,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:36:58,340 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2023-12-18 21:36:58,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 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 21:36:58,340 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2023-12-18 21:36:58,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-18 21:36:58,340 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:36:58,340 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:36:58,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-12-18 21:36:58,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:58,546 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:36:58,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:36:58,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1632983350, now seen corresponding path program 15 times [2023-12-18 21:36:58,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:36:58,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606095386] [2023-12-18 21:36:58,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:36:58,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:36:58,566 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:36:58,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847627571] [2023-12-18 21:36:58,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:36:58,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:36:58,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:36:58,581 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:36:58,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-18 21:36:59,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-12-18 21:36:59,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:36:59,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 59 conjunts are in the unsatisfiable core [2023-12-18 21:36:59,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:36:59,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:36:59,107 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 21:36:59,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:59,129 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 21:36:59,154 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:59,154 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 21:36:59,186 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:59,187 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 21:36:59,225 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:59,226 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 21:36:59,626 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:36:59,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 52 treesize of output 70 [2023-12-18 21:37:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2023-12-18 21:37:00,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:37:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 48 proven. 210 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-12-18 21:37:00,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:37:00,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606095386] [2023-12-18 21:37:00,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:37:00,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847627571] [2023-12-18 21:37:00,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847627571] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:37:00,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:37:00,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 42 [2023-12-18 21:37:00,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345801904] [2023-12-18 21:37:00,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:37:00,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-18 21:37:00,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:37:00,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-18 21:37:00,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2023-12-18 21:37:00,584 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:37:11,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:37:11,553 INFO L93 Difference]: Finished difference Result 352 states and 422 transitions. [2023-12-18 21:37:11,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2023-12-18 21:37:11,554 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-12-18 21:37:11,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:37:11,557 INFO L225 Difference]: With dead ends: 352 [2023-12-18 21:37:11,557 INFO L226 Difference]: Without dead ends: 331 [2023-12-18 21:37:11,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18211 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=9299, Invalid=49993, Unknown=0, NotChecked=0, Total=59292 [2023-12-18 21:37:11,560 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 281 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2555 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 2744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 2555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-18 21:37:11,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 133 Invalid, 2744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 2555 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-18 21:37:11,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-12-18 21:37:11,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 86. [2023-12-18 21:37:11,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 85 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:37:11,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2023-12-18 21:37:11,656 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 65 [2023-12-18 21:37:11,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:37:11,656 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2023-12-18 21:37:11,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 42 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:37:11,657 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2023-12-18 21:37:11,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-18 21:37:11,657 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:37:11,657 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:37:11,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-12-18 21:37:11,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-12-18 21:37:11,865 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:37:11,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:37:11,865 INFO L85 PathProgramCache]: Analyzing trace with hash 209372160, now seen corresponding path program 16 times [2023-12-18 21:37:11,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:37:11,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435872372] [2023-12-18 21:37:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:37:11,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:37:11,888 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:37:11,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96978465] [2023-12-18 21:37:11,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:37:11,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:37:11,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:37:11,889 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:37:11,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-18 21:37:12,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:37:12,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:37:12,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-18 21:37:12,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:37:12,115 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 21:37:12,121 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 21:37:12,133 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:37:12,133 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 21:37:12,151 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:37:12,151 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 21:37:12,176 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:37:12,177 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 21:37:12,206 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:37:12,206 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 21:37:12,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:37:12,243 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 88 treesize of output 102 [2023-12-18 21:37:12,675 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:37:12,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 96 treesize of output 95 [2023-12-18 21:37:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 71 proven. 244 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-12-18 21:37:13,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:37:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 56 proven. 259 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-12-18 21:37:13,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:37:13,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435872372] [2023-12-18 21:37:13,445 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:37:13,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96978465] [2023-12-18 21:37:13,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96978465] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:37:13,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:37:13,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2023-12-18 21:37:13,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230750134] [2023-12-18 21:37:13,446 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:37:13,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-18 21:37:13,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:37:13,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-18 21:37:13,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2023-12-18 21:37:13,447 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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 21:37:15,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:37:15,351 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2023-12-18 21:37:15,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-18 21:37:15,351 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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) Word has length 69 [2023-12-18 21:37:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:37:15,352 INFO L225 Difference]: With dead ends: 94 [2023-12-18 21:37:15,352 INFO L226 Difference]: Without dead ends: 90 [2023-12-18 21:37:15,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=519, Invalid=2237, Unknown=0, NotChecked=0, Total=2756 [2023-12-18 21:37:15,354 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 60 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 21:37:15,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 41 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 21:37:15,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-18 21:37:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2023-12-18 21:37:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.125) internal successors, (99), 88 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:37:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2023-12-18 21:37:15,434 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 69 [2023-12-18 21:37:15,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:37:15,435 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2023-12-18 21:37:15,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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 21:37:15,436 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2023-12-18 21:37:15,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-18 21:37:15,436 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:37:15,436 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:37:15,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-12-18 21:37:15,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:37:15,642 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:37:15,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:37:15,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1642442490, now seen corresponding path program 17 times [2023-12-18 21:37:15,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:37:15,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781067555] [2023-12-18 21:37:15,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:37:15,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:37:15,658 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:37:15,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956011269] [2023-12-18 21:37:15,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-18 21:37:15,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:37:15,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:37:15,663 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:37:15,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-18 21:37:16,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2023-12-18 21:37:16,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:37:16,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-18 21:37:16,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:37:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 376 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:37:16,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:37:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 376 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:37:17,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:37:17,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781067555] [2023-12-18 21:37:17,264 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:37:17,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956011269] [2023-12-18 21:37:17,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956011269] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:37:17,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:37:17,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 52 [2023-12-18 21:37:17,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919341362] [2023-12-18 21:37:17,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:37:17,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-18 21:37:17,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:37:17,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-18 21:37:17,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=645, Invalid=2007, Unknown=0, NotChecked=0, Total=2652 [2023-12-18 21:37:17,266 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 52 states, 52 states have (on average 2.3461538461538463) internal successors, (122), 52 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 21:37:18,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:37:18,470 INFO L93 Difference]: Finished difference Result 488 states and 593 transitions. [2023-12-18 21:37:18,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-12-18 21:37:18,470 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.3461538461538463) internal successors, (122), 52 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2023-12-18 21:37:18,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:37:18,471 INFO L225 Difference]: With dead ends: 488 [2023-12-18 21:37:18,471 INFO L226 Difference]: Without dead ends: 192 [2023-12-18 21:37:18,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 78 SyntacticMatches, 14 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2630 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1982, Invalid=7720, Unknown=0, NotChecked=0, Total=9702 [2023-12-18 21:37:18,472 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 594 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 21:37:18,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 27 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 21:37:18,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-12-18 21:37:18,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 75. [2023-12-18 21:37:18,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.135135135135135) internal successors, (84), 74 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 21:37:18,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2023-12-18 21:37:18,546 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 72 [2023-12-18 21:37:18,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:37:18,546 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2023-12-18 21:37:18,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.3461538461538463) internal successors, (122), 52 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 21:37:18,546 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2023-12-18 21:37:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-18 21:37:18,546 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:37:18,546 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:37:18,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-12-18 21:37:18,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:37:18,756 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:37:18,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:37:18,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1778274694, now seen corresponding path program 18 times [2023-12-18 21:37:18,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:37:18,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469304296] [2023-12-18 21:37:18,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:37:18,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:37:18,775 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:37:18,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366795948] [2023-12-18 21:37:18,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-18 21:37:18,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:37:18,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:37:18,777 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:37:18,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-18 21:37:21,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-12-18 21:37:21,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:37:21,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 86 conjunts are in the unsatisfiable core [2023-12-18 21:37:21,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:37:21,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 21:37:21,945 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-18 21:37:21,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2023-12-18 21:37:21,998 INFO L349 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2023-12-18 21:37:21,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2023-12-18 21:37:22,054 INFO L349 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2023-12-18 21:37:22,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2023-12-18 21:37:22,110 INFO L349 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2023-12-18 21:37:22,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2023-12-18 21:37:22,170 INFO L349 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2023-12-18 21:37:22,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 48 [2023-12-18 21:37:22,245 INFO L349 Elim1Store]: treesize reduction 82, result has 17.2 percent of original size [2023-12-18 21:37:22,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 54 treesize of output 62 [2023-12-18 21:37:22,333 INFO L349 Elim1Store]: treesize reduction 96, result has 15.0 percent of original size [2023-12-18 21:37:22,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 63 treesize of output 74 [2023-12-18 21:37:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 221 proven. 211 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-12-18 21:37:47,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:37:50,275 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 68 treesize of output 66 [2023-12-18 21:37:50,282 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 79 treesize of output 75 [2023-12-18 21:37:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 98 proven. 414 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:37:50,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:37:50,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469304296] [2023-12-18 21:37:50,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:37:50,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366795948] [2023-12-18 21:37:50,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366795948] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:37:50,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:37:50,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 42] total 68 [2023-12-18 21:37:50,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342207365] [2023-12-18 21:37:50,598 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:37:50,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-12-18 21:37:50,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:37:50,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-12-18 21:37:50,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=564, Invalid=3981, Unknown=11, NotChecked=0, Total=4556 [2023-12-18 21:37:50,599 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 68 states, 68 states have (on average 1.7941176470588236) internal successors, (122), 68 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 21:37:55,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:37:59,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:38:07,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:38:12,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:38:24,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:38:32,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:38:36,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:38:41,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:38:45,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:38:50,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:38:58,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:39:02,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:39:11,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:39:19,425 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:39:23,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:39:28,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:39:37,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:39:41,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:39:49,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:39:56,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:40:00,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:40:09,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:40:17,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:40:18,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:40:22,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:40:43,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:40:51,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:40:55,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-18 21:40:59,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:41:00,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:41:00,022 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2023-12-18 21:41:00,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-18 21:41:00,023 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.7941176470588236) internal successors, (122), 68 states have internal predecessors, (122), 0 states have call successors, (0), 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 74 [2023-12-18 21:41:00,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:41:00,023 INFO L225 Difference]: With dead ends: 110 [2023-12-18 21:41:00,023 INFO L226 Difference]: Without dead ends: 83 [2023-12-18 21:41:00,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2035 ImplicationChecksByTransitivity, 106.1s TimeCoverageRelationStatistics Valid=1108, Invalid=7412, Unknown=36, NotChecked=0, Total=8556 [2023-12-18 21:41:00,024 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 107 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 45 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 110.9s IncrementalHoareTripleChecker+Time [2023-12-18 21:41:00,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 88 Invalid, 1663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1592 Invalid, 26 Unknown, 0 Unchecked, 110.9s Time] [2023-12-18 21:41:00,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-18 21:41:00,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2023-12-18 21:41:00,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.12987012987013) internal successors, (87), 77 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:41:00,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2023-12-18 21:41:00,093 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 74 [2023-12-18 21:41:00,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:41:00,093 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2023-12-18 21:41:00,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.7941176470588236) internal successors, (122), 68 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 21:41:00,093 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2023-12-18 21:41:00,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-18 21:41:00,093 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:41:00,094 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:41:00,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-12-18 21:41:00,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-12-18 21:41:00,302 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:41:00,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:41:00,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1599428612, now seen corresponding path program 19 times [2023-12-18 21:41:00,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:41:00,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703747649] [2023-12-18 21:41:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:41:00,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:41:00,321 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:41:00,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1732220787] [2023-12-18 21:41:00,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-18 21:41:00,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:41:00,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:41:00,322 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:41:00,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-12-18 21:41:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 21:41:00,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-18 21:41:00,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:41:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 425 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:41:01,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:41:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 425 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 21:41:01,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:41:01,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703747649] [2023-12-18 21:41:01,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:41:01,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732220787] [2023-12-18 21:41:01,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732220787] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:41:01,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:41:01,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 54 [2023-12-18 21:41:01,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46848561] [2023-12-18 21:41:01,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:41:01,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-12-18 21:41:01,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:41:01,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-12-18 21:41:01,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2023-12-18 21:41:01,656 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 21:41:02,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:41:02,526 INFO L93 Difference]: Finished difference Result 353 states and 435 transitions. [2023-12-18 21:41:02,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-18 21:41:02,526 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 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 77 [2023-12-18 21:41:02,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:41:02,527 INFO L225 Difference]: With dead ends: 353 [2023-12-18 21:41:02,527 INFO L226 Difference]: Without dead ends: 196 [2023-12-18 21:41:02,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 82 SyntacticMatches, 18 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1215, Invalid=3897, Unknown=0, NotChecked=0, Total=5112 [2023-12-18 21:41:02,528 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 300 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-18 21:41:02,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 31 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-18 21:41:02,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-12-18 21:41:02,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 79. [2023-12-18 21:41:02,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 78 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 21:41:02,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2023-12-18 21:41:02,606 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 77 [2023-12-18 21:41:02,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:41:02,606 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2023-12-18 21:41:02,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.3518518518518516) internal successors, (127), 54 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 21:41:02,607 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2023-12-18 21:41:02,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-18 21:41:02,607 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:41:02,607 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:41:02,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-12-18 21:41:02,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-12-18 21:41:02,813 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:41:02,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:41:02,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1103259008, now seen corresponding path program 20 times [2023-12-18 21:41:02,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:41:02,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139132399] [2023-12-18 21:41:02,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:41:02,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:41:02,829 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:41:02,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583780031] [2023-12-18 21:41:02,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 21:41:02,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:41:02,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:41:02,830 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:41:02,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-18 21:41:03,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 21:41:03,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:41:03,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 68 conjunts are in the unsatisfiable core [2023-12-18 21:41:03,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:41:03,193 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 21:41:03,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-18 21:41:03,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,254 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:41:03,254 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 30 treesize of output 32 [2023-12-18 21:41:03,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,307 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:41:03,308 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 39 treesize of output 44 [2023-12-18 21:41:03,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,377 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:41:03,377 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 48 treesize of output 56 [2023-12-18 21:41:03,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,470 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:41:03,470 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 57 treesize of output 68 [2023-12-18 21:41:03,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,595 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:41:03,596 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 66 treesize of output 80 [2023-12-18 21:41:03,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:03,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:04,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:04,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:04,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:04,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 21:41:04,003 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:41:04,003 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 75 treesize of output 92 [2023-12-18 21:41:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 243 proven. 258 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-18 21:41:25,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:41:35,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2023-12-18 21:41:35,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-12-18 21:41:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 229 proven. 251 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2023-12-18 21:41:35,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:41:35,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139132399] [2023-12-18 21:41:35,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:41:35,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583780031] [2023-12-18 21:41:35,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583780031] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:41:35,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:41:35,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 25] total 53 [2023-12-18 21:41:35,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892328719] [2023-12-18 21:41:35,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:41:35,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-18 21:41:35,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:41:35,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-18 21:41:35,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2538, Unknown=5, NotChecked=0, Total=2756 [2023-12-18 21:41:35,650 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 53 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 53 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 21:41:41,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:41:42,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:41:43,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:41:45,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:41:46,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:41:47,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:41:49,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:41:50,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:41:51,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:41:52,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:41:54,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:41:55,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:41:57,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:41:58,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:00,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:01,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:03,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:04,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:05,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:07,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:08,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:09,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:11,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:12,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:13,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:15,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:16,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:17,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:19,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:20,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:22,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:23,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:24,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:26,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:27,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-18 21:42:29,143 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:30,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-18 21:42:30,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:42:30,681 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2023-12-18 21:42:30,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-18 21:42:30,681 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 53 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2023-12-18 21:42:30,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:42:30,682 INFO L225 Difference]: With dead ends: 110 [2023-12-18 21:42:30,682 INFO L226 Difference]: Without dead ends: 83 [2023-12-18 21:42:30,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 97 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=242, Invalid=2833, Unknown=5, NotChecked=0, Total=3080 [2023-12-18 21:42:30,682 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 1741 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1741 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.6s IncrementalHoareTripleChecker+Time [2023-12-18 21:42:30,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 163 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1741 Invalid, 1 Unknown, 0 Unchecked, 54.6s Time] [2023-12-18 21:42:30,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-18 21:42:30,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2023-12-18 21:42:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.123456790123457) internal successors, (91), 81 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 21:42:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2023-12-18 21:42:30,768 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 78 [2023-12-18 21:42:30,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:42:30,768 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2023-12-18 21:42:30,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 53 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 21:42:30,769 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2023-12-18 21:42:30,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-18 21:42:30,769 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:42:30,769 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:42:30,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-12-18 21:42:30,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-12-18 21:42:30,976 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:42:30,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:42:30,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1340257482, now seen corresponding path program 21 times [2023-12-18 21:42:30,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:42:30,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181537705] [2023-12-18 21:42:30,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:42:30,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:42:31,010 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:42:31,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314138135] [2023-12-18 21:42:31,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 21:42:31,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:42:31,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:42:31,019 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:42:31,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-18 21:42:32,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-12-18 21:42:32,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:42:32,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 53 conjunts are in the unsatisfiable core [2023-12-18 21:42:32,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:42:32,509 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 21:42:32,515 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 21:42:32,528 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:32,528 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 21:42:32,547 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:32,547 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 21:42:32,571 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:32,572 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 21:42:32,603 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:32,603 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 21:42:32,638 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:32,638 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 21:42:32,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:32,683 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 100 treesize of output 117 [2023-12-18 21:42:33,367 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:33,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 108 treesize of output 108 [2023-12-18 21:42:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 101 proven. 339 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-18 21:42:34,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:42:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 80 proven. 360 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-18 21:42:34,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:42:34,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181537705] [2023-12-18 21:42:34,654 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:42:34,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314138135] [2023-12-18 21:42:34,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314138135] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:42:34,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:42:34,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 39 [2023-12-18 21:42:34,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083592440] [2023-12-18 21:42:34,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:42:34,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-18 21:42:34,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:42:34,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-18 21:42:34,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2023-12-18 21:42:34,661 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:42:38,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 21:42:38,522 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2023-12-18 21:42:38,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-18 21:42:38,522 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2023-12-18 21:42:38,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 21:42:38,523 INFO L225 Difference]: With dead ends: 89 [2023-12-18 21:42:38,523 INFO L226 Difference]: Without dead ends: 85 [2023-12-18 21:42:38,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=626, Invalid=2796, Unknown=0, NotChecked=0, Total=3422 [2023-12-18 21:42:38,523 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 41 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-18 21:42:38,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 58 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-18 21:42:38,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-18 21:42:38,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-12-18 21:42:38,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.130952380952381) internal successors, (95), 84 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:42:38,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2023-12-18 21:42:38,612 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 81 [2023-12-18 21:42:38,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 21:42:38,613 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2023-12-18 21:42:38,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:42:38,613 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2023-12-18 21:42:38,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-18 21:42:38,613 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 21:42:38,613 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 21:42:38,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-12-18 21:42:38,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:42:38,822 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 21:42:38,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 21:42:38,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1161284612, now seen corresponding path program 22 times [2023-12-18 21:42:38,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 21:42:38,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857508784] [2023-12-18 21:42:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 21:42:38,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 21:42:38,846 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 21:42:38,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883797536] [2023-12-18 21:42:38,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-18 21:42:38,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 21:42:38,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 21:42:38,847 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 21:42:38,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-18 21:42:39,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-18 21:42:39,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 21:42:39,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 81 conjunts are in the unsatisfiable core [2023-12-18 21:42:39,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 21:42:39,105 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 21:42:39,111 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 21:42:39,123 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:39,123 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 21:42:39,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:39,141 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 21:42:39,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:39,167 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 21:42:39,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:39,200 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 21:42:39,248 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:39,249 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 21:42:39,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:39,321 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 21:42:39,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:39,392 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 112 treesize of output 132 [2023-12-18 21:42:40,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-18 21:42:40,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 118 treesize of output 103 [2023-12-18 21:42:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 109 proven. 540 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-18 21:42:41,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 21:42:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 81 proven. 568 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-18 21:42:43,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 21:42:43,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857508784] [2023-12-18 21:42:43,247 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 21:42:43,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883797536] [2023-12-18 21:42:43,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883797536] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 21:42:43,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 21:42:43,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2023-12-18 21:42:43,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340991919] [2023-12-18 21:42:43,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 21:42:43,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-12-18 21:42:43,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 21:42:43,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-12-18 21:42:43,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=3939, Unknown=0, NotChecked=0, Total=4556 [2023-12-18 21:42:43,249 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 68 states, 68 states have (on average 2.1470588235294117) internal successors, (146), 68 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 21:44:57,582 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-18 21:44:57,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 665 states. [2023-12-18 21:44:57,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 829 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 728 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232334 ImplicationChecksByTransitivity, 124.6s TimeCoverageRelationStatistics Valid=46903, Invalid=485267, Unknown=0, NotChecked=0, Total=532170 [2023-12-18 21:44:57,608 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 285 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 9295 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 9407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 9295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2023-12-18 21:44:57,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 47 Invalid, 9407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 9295 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2023-12-18 21:44:57,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2023-12-18 21:44:57,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-12-18 21:44:57,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-12-18 21:44:57,810 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:281) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:950) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:789) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:377) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:247) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 47 more [2023-12-18 21:44:57,814 INFO L158 Benchmark]: Toolchain (without parser) took 566790.71ms. Allocated memory was 281.0MB in the beginning and 1.1GB in the end (delta: 786.4MB). Free memory was 236.3MB in the beginning and 551.6MB in the end (delta: -315.3MB). Peak memory consumption was 472.2MB. Max. memory is 8.0GB. [2023-12-18 21:44:57,814 INFO L158 Benchmark]: CDTParser took 0.53ms. Allocated memory is still 188.7MB. Free memory is still 137.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 21:44:57,814 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.67ms. Allocated memory is still 281.0MB. Free memory was 235.8MB in the beginning and 224.7MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 21:44:57,814 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.12ms. Allocated memory is still 281.0MB. Free memory was 224.7MB in the beginning and 223.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-18 21:44:57,814 INFO L158 Benchmark]: Boogie Preprocessor took 53.85ms. Allocated memory is still 281.0MB. Free memory was 223.2MB in the beginning and 221.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 21:44:57,814 INFO L158 Benchmark]: RCFGBuilder took 252.70ms. Allocated memory is still 281.0MB. Free memory was 221.1MB in the beginning and 208.0MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-18 21:44:57,814 INFO L158 Benchmark]: TraceAbstraction took 566268.21ms. Allocated memory was 281.0MB in the beginning and 1.1GB in the end (delta: 786.4MB). Free memory was 206.9MB in the beginning and 551.6MB in the end (delta: -344.7MB). Peak memory consumption was 442.9MB. Max. memory is 8.0GB. [2023-12-18 21:44:57,815 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53ms. Allocated memory is still 188.7MB. Free memory is still 137.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 184.67ms. Allocated memory is still 281.0MB. Free memory was 235.8MB in the beginning and 224.7MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.12ms. Allocated memory is still 281.0MB. Free memory was 224.7MB in the beginning and 223.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 53.85ms. Allocated memory is still 281.0MB. Free memory was 223.2MB in the beginning and 221.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 252.70ms. Allocated memory is still 281.0MB. Free memory was 221.1MB in the beginning and 208.0MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 566268.21ms. Allocated memory was 281.0MB in the beginning and 1.1GB in the end (delta: 786.4MB). Free memory was 206.9MB in the beginning and 551.6MB in the end (delta: -344.7MB). Peak memory consumption was 442.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...