/usr/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 -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-tiling/pr5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:58:49,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:58:49,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:58:49,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 18:58:49,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 18:58:49,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 18:58:49,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 18:58:49,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 18:58:49,483 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 18:58:49,484 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 18:58:49,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 18:58:49,487 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 18:58:49,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 18:58:49,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 18:58:49,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 18:58:49,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 18:58:49,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 18:58:49,500 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 18:58:49,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 18:58:49,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 18:58:49,502 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 18:58:49,519 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:58:49,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:58:49,519 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:58:49,519 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:58:49,520 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:58:49,520 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:58:49,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:58:49,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:58:49,521 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:58:49,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:58:49,522 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:58:49,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:58:49,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:58:49,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:58:49,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:58:49,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:58:49,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:58:49,523 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:58:49,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:58:49,523 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:58:49,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:58:49,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:58:49,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:58:49,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:58:49,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:58:49,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:58:49,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:58:49,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:58:49,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:58:49,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:58:49,525 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:58:49,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:58:49,525 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:58:49,526 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:58:49,526 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:58:49,526 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:58:49,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:58:49,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:58:49,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:58:49,712 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:58:49,712 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:58:49,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pr5.c [2023-04-01 18:58:50,901 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:58:51,066 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:58:51,067 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr5.c [2023-04-01 18:58:51,072 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aae601277/11f948e4e17649ea80594bab78502dc5/FLAG295bb7ad2 [2023-04-01 18:58:51,083 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aae601277/11f948e4e17649ea80594bab78502dc5 [2023-04-01 18:58:51,087 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:58:51,088 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:58:51,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:58:51,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:58:51,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:58:51,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:58:51" (1/1) ... [2023-04-01 18:58:51,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3376ad00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:51, skipping insertion in model container [2023-04-01 18:58:51,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:58:51" (1/1) ... [2023-04-01 18:58:51,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:58:51,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:58:51,237 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr5.c[394,407] [2023-04-01 18:58:51,262 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:58:51,273 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:58:51,282 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr5.c[394,407] [2023-04-01 18:58:51,291 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:58:51,301 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:58:51,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:51 WrapperNode [2023-04-01 18:58:51,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:58:51,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:58:51,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:58:51,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:58:51,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:51" (1/1) ... [2023-04-01 18:58:51,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:51" (1/1) ... [2023-04-01 18:58:51,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:51" (1/1) ... [2023-04-01 18:58:51,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:51" (1/1) ... [2023-04-01 18:58:51,325 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:51" (1/1) ... [2023-04-01 18:58:51,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:51" (1/1) ... [2023-04-01 18:58:51,329 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:51" (1/1) ... [2023-04-01 18:58:51,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:51" (1/1) ... [2023-04-01 18:58:51,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:58:51,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:58:51,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:58:51,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:58:51,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:51" (1/1) ... [2023-04-01 18:58:51,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:58:51,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:58:51,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 18:58:51,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 18:58:51,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:58:51,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:58:51,400 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:58:51,400 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 18:58:51,400 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:58:51,400 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:58:51,401 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:58:51,401 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:58:51,401 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:58:51,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:58:51,401 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 18:58:51,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:58:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:58:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:58:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:58:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:58:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:58:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:58:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:58:51,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:58:51,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:58:51,456 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:58:51,458 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:58:51,628 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:58:51,633 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:58:51,633 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 18:58:51,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:58:51 BoogieIcfgContainer [2023-04-01 18:58:51,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:58:51,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:58:51,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:58:51,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:58:51,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:58:51" (1/3) ... [2023-04-01 18:58:51,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5e1bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:58:51, skipping insertion in model container [2023-04-01 18:58:51,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:58:51" (2/3) ... [2023-04-01 18:58:51,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5e1bd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:58:51, skipping insertion in model container [2023-04-01 18:58:51,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:58:51" (3/3) ... [2023-04-01 18:58:51,642 INFO L112 eAbstractionObserver]: Analyzing ICFG pr5.c [2023-04-01 18:58:51,683 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:58:51,683 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:58:51,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:58:51,758 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=LoopsAndPotentialCycles, 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;@536f16e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:58:51,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:58:51,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 30 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:58:51,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 18:58:51,767 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:51,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:51,768 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:51,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:51,772 INFO L85 PathProgramCache]: Analyzing trace with hash -321625888, now seen corresponding path program 1 times [2023-04-01 18:58:51,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:51,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107890530] [2023-04-01 18:58:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:51,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:51,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:51,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:52,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:52,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:52,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107890530] [2023-04-01 18:58:52,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107890530] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:58:52,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:58:52,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:58:52,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166563993] [2023-04-01 18:58:52,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:58:52,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:58:52,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:52,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:58:52,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:58:52,078 INFO L87 Difference]: Start difference. First operand has 39 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 30 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:58:52,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:52,194 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2023-04-01 18:58:52,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:58:52,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-04-01 18:58:52,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:52,201 INFO L225 Difference]: With dead ends: 67 [2023-04-01 18:58:52,201 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 18:58:52,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:58:52,223 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:52,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 43 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:58:52,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 18:58:52,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-01 18:58:52,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:58:52,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-04-01 18:58:52,260 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2023-04-01 18:58:52,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:52,261 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-04-01 18:58:52,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:58:52,261 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-04-01 18:58:52,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 18:58:52,263 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:52,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:52,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:58:52,263 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:52,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:52,266 INFO L85 PathProgramCache]: Analyzing trace with hash -63460450, now seen corresponding path program 1 times [2023-04-01 18:58:52,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:52,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684009494] [2023-04-01 18:58:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:52,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:52,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:52,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:52,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:52,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684009494] [2023-04-01 18:58:52,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684009494] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:58:52,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:58:52,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 18:58:52,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530636181] [2023-04-01 18:58:52,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:58:52,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 18:58:52,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:52,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 18:58:52,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:58:52,478 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:58:52,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:52,611 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-04-01 18:58:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:58:52,611 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2023-04-01 18:58:52,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:52,614 INFO L225 Difference]: With dead ends: 41 [2023-04-01 18:58:52,614 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 18:58:52,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-04-01 18:58:52,620 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:52,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 112 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:58:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 18:58:52,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2023-04-01 18:58:52,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:58:52,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2023-04-01 18:58:52,634 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 22 [2023-04-01 18:58:52,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:52,635 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2023-04-01 18:58:52,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:58:52,635 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2023-04-01 18:58:52,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 18:58:52,636 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:52,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:52,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:58:52,636 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:52,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:52,637 INFO L85 PathProgramCache]: Analyzing trace with hash -61613408, now seen corresponding path program 1 times [2023-04-01 18:58:52,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:52,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619999896] [2023-04-01 18:58:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:52,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:52,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:52,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:52,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:52,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619999896] [2023-04-01 18:58:52,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619999896] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:58:52,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:58:52,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 18:58:52,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951536164] [2023-04-01 18:58:52,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:58:52,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 18:58:52,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:52,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 18:58:52,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:58:52,937 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:58:53,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:53,053 INFO L93 Difference]: Finished difference Result 62 states and 76 transitions. [2023-04-01 18:58:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:58:53,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-04-01 18:58:53,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:53,059 INFO L225 Difference]: With dead ends: 62 [2023-04-01 18:58:53,059 INFO L226 Difference]: Without dead ends: 45 [2023-04-01 18:58:53,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 18:58:53,065 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 88 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:53,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 22 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:58:53,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-04-01 18:58:53,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2023-04-01 18:58:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 30 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:58:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-04-01 18:58:53,087 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 22 [2023-04-01 18:58:53,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:53,087 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-04-01 18:58:53,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:58:53,088 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-04-01 18:58:53,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 18:58:53,089 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:53,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:53,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 18:58:53,089 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:53,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:53,090 INFO L85 PathProgramCache]: Analyzing trace with hash -97683673, now seen corresponding path program 1 times [2023-04-01 18:58:53,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:53,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363575682] [2023-04-01 18:58:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:53,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:53,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:53,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:53,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:53,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363575682] [2023-04-01 18:58:53,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363575682] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:58:53,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:58:53,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 18:58:53,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859508638] [2023-04-01 18:58:53,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:58:53,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 18:58:53,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:53,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 18:58:53,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:58:53,221 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:58:53,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:53,329 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2023-04-01 18:58:53,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 18:58:53,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-04-01 18:58:53,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:53,333 INFO L225 Difference]: With dead ends: 77 [2023-04-01 18:58:53,333 INFO L226 Difference]: Without dead ends: 53 [2023-04-01 18:58:53,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:58:53,338 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:53,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 47 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:58:53,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-04-01 18:58:53,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2023-04-01 18:58:53,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 37 states have internal predecessors, (48), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:58:53,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2023-04-01 18:58:53,361 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 29 [2023-04-01 18:58:53,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:53,361 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2023-04-01 18:58:53,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:58:53,362 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2023-04-01 18:58:53,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 18:58:53,363 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:53,363 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:53,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 18:58:53,363 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:53,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:53,364 INFO L85 PathProgramCache]: Analyzing trace with hash -490710683, now seen corresponding path program 1 times [2023-04-01 18:58:53,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:53,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001856599] [2023-04-01 18:58:53,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:53,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:53,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:53,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:53,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:53,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:53,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001856599] [2023-04-01 18:58:53,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001856599] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:58:53,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808968287] [2023-04-01 18:58:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:53,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:53,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:58:53,919 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) [2023-04-01 18:58:53,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 18:58:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:54,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-01 18:58:54,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:58:54,211 INFO L350 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 [2023-04-01 18:58:54,224 INFO L350 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 [2023-04-01 18:58:54,240 INFO L350 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 [2023-04-01 18:58:54,252 INFO L350 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 [2023-04-01 18:58:54,263 INFO L350 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 [2023-04-01 18:58:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:54,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:58:54,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-04-01 18:58:54,491 INFO L350 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 [2023-04-01 18:58:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:54,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808968287] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:58:54,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:58:54,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 8] total 21 [2023-04-01 18:58:54,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385100304] [2023-04-01 18:58:54,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:58:54,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 18:58:54,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:54,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 18:58:54,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2023-04-01 18:58:54,533 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 18:58:55,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:55,118 INFO L93 Difference]: Finished difference Result 100 states and 136 transitions. [2023-04-01 18:58:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-01 18:58:55,120 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2023-04-01 18:58:55,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:55,124 INFO L225 Difference]: With dead ends: 100 [2023-04-01 18:58:55,124 INFO L226 Difference]: Without dead ends: 98 [2023-04-01 18:58:55,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 18:58:55,125 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 264 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:55,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 155 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:58:55,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-04-01 18:58:55,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 57. [2023-04-01 18:58:55,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:58:55,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2023-04-01 18:58:55,142 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 29 [2023-04-01 18:58:55,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:55,143 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2023-04-01 18:58:55,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 18:58:55,143 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2023-04-01 18:58:55,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 18:58:55,144 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:55,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:55,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 18:58:55,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:55,350 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:55,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:55,351 INFO L85 PathProgramCache]: Analyzing trace with hash 913433577, now seen corresponding path program 1 times [2023-04-01 18:58:55,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:55,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600713980] [2023-04-01 18:58:55,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:55,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:55,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:55,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:55,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:55,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600713980] [2023-04-01 18:58:55,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600713980] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:58:55,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716162540] [2023-04-01 18:58:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:55,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:55,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:58:55,800 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) [2023-04-01 18:58:55,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 18:58:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:55,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 18:58:55,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:58:55,900 INFO L350 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 [2023-04-01 18:58:55,925 INFO L350 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 [2023-04-01 18:58:55,938 INFO L350 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 [2023-04-01 18:58:55,948 INFO L350 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 [2023-04-01 18:58:55,964 INFO L350 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 [2023-04-01 18:58:56,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:58:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:56,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:58:56,182 INFO L350 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 17 treesize of output 15 [2023-04-01 18:58:56,186 INFO L350 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 14 [2023-04-01 18:58:56,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:56,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716162540] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:58:56,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:58:56,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 19 [2023-04-01 18:58:56,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844067953] [2023-04-01 18:58:56,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:58:56,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-04-01 18:58:56,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:56,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-04-01 18:58:56,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-04-01 18:58:56,208 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 18:58:56,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:56,955 INFO L93 Difference]: Finished difference Result 157 states and 220 transitions. [2023-04-01 18:58:56,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 18:58:56,956 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2023-04-01 18:58:56,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:56,957 INFO L225 Difference]: With dead ends: 157 [2023-04-01 18:58:56,958 INFO L226 Difference]: Without dead ends: 126 [2023-04-01 18:58:56,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 18:58:56,959 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 145 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:56,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 159 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 18:58:56,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-04-01 18:58:56,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 71. [2023-04-01 18:58:56,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 62 states have internal predecessors, (87), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:58:56,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2023-04-01 18:58:56,971 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 29 [2023-04-01 18:58:56,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:56,972 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2023-04-01 18:58:56,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 18:58:56,972 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2023-04-01 18:58:56,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 18:58:56,973 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:56,973 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:56,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 18:58:57,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-04-01 18:58:57,178 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:57,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:57,179 INFO L85 PathProgramCache]: Analyzing trace with hash -704661506, now seen corresponding path program 1 times [2023-04-01 18:58:57,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:57,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476982125] [2023-04-01 18:58:57,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:57,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:57,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:57,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:57,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:57,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476982125] [2023-04-01 18:58:57,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476982125] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:58:57,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:58:57,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:58:57,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954523784] [2023-04-01 18:58:57,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:58:57,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:58:57,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:57,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:58:57,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:58:57,225 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:58:57,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:57,296 INFO L93 Difference]: Finished difference Result 93 states and 122 transitions. [2023-04-01 18:58:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:58:57,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2023-04-01 18:58:57,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:57,297 INFO L225 Difference]: With dead ends: 93 [2023-04-01 18:58:57,298 INFO L226 Difference]: Without dead ends: 69 [2023-04-01 18:58:57,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:58:57,298 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 19 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:57,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 60 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:58:57,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-04-01 18:58:57,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2023-04-01 18:58:57,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 53 states have (on average 1.3962264150943395) internal successors, (74), 54 states have internal predecessors, (74), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 18:58:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2023-04-01 18:58:57,307 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 36 [2023-04-01 18:58:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:57,308 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2023-04-01 18:58:57,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 18:58:57,308 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2023-04-01 18:58:57,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 18:58:57,309 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:57,309 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:57,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 18:58:57,309 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:57,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:57,310 INFO L85 PathProgramCache]: Analyzing trace with hash -735009978, now seen corresponding path program 1 times [2023-04-01 18:58:57,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:57,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000795710] [2023-04-01 18:58:57,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:57,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:57,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:57,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:57,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 18:58:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:57,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:57,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000795710] [2023-04-01 18:58:57,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000795710] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:58:57,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688120569] [2023-04-01 18:58:57,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:57,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:57,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:58:57,757 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) [2023-04-01 18:58:57,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 18:58:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:57,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 18:58:57,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:58:57,871 INFO L350 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 [2023-04-01 18:58:57,901 INFO L350 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 [2023-04-01 18:58:57,912 INFO L350 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 [2023-04-01 18:58:57,922 INFO L350 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 [2023-04-01 18:58:57,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:58:58,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:58,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:58:58,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-04-01 18:58:58,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2023-04-01 18:58:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:58,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688120569] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:58:58,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:58:58,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2023-04-01 18:58:58,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136049457] [2023-04-01 18:58:58,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:58:58,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 18:58:58,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:58,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 18:58:58,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-04-01 18:58:58,163 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 18:58:58,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:58,888 INFO L93 Difference]: Finished difference Result 305 states and 438 transitions. [2023-04-01 18:58:58,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 18:58:58,889 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 38 [2023-04-01 18:58:58,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:58,891 INFO L225 Difference]: With dead ends: 305 [2023-04-01 18:58:58,891 INFO L226 Difference]: Without dead ends: 262 [2023-04-01 18:58:58,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=361, Invalid=1279, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 18:58:58,893 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 183 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:58,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 115 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 18:58:58,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-04-01 18:58:58,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 121. [2023-04-01 18:58:58,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 110 states have (on average 1.4454545454545455) internal successors, (159), 111 states have internal predecessors, (159), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 18:58:58,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 170 transitions. [2023-04-01 18:58:58,919 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 170 transitions. Word has length 38 [2023-04-01 18:58:58,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:58,920 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 170 transitions. [2023-04-01 18:58:58,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-04-01 18:58:58,921 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 170 transitions. [2023-04-01 18:58:58,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 18:58:58,927 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:58,927 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:58,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 18:58:59,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:59,133 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:59,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:59,133 INFO L85 PathProgramCache]: Analyzing trace with hash -516155260, now seen corresponding path program 1 times [2023-04-01 18:58:59,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:59,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151297212] [2023-04-01 18:58:59,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:59,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:59,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:59,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:59,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 18:58:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:58:59,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:59,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151297212] [2023-04-01 18:58:59,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151297212] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:58:59,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:58:59,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 18:58:59,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963246259] [2023-04-01 18:58:59,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:58:59,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 18:58:59,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:58:59,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 18:58:59,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:58:59,214 INFO L87 Difference]: Start difference. First operand 121 states and 170 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:58:59,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:58:59,306 INFO L93 Difference]: Finished difference Result 173 states and 241 transitions. [2023-04-01 18:58:59,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 18:58:59,306 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 38 [2023-04-01 18:58:59,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:58:59,309 INFO L225 Difference]: With dead ends: 173 [2023-04-01 18:58:59,309 INFO L226 Difference]: Without dead ends: 129 [2023-04-01 18:58:59,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 18:58:59,311 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 40 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:58:59,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 65 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:58:59,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-04-01 18:58:59,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2023-04-01 18:58:59,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 110 states have (on average 1.3818181818181818) internal successors, (152), 111 states have internal predecessors, (152), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 18:58:59,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 163 transitions. [2023-04-01 18:58:59,327 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 163 transitions. Word has length 38 [2023-04-01 18:58:59,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:58:59,327 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 163 transitions. [2023-04-01 18:58:59,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:58:59,327 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 163 transitions. [2023-04-01 18:58:59,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 18:58:59,328 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:58:59,329 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:58:59,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-01 18:58:59,329 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:58:59,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:58:59,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1333803710, now seen corresponding path program 1 times [2023-04-01 18:58:59,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:58:59,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259736325] [2023-04-01 18:58:59,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:59,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:58:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:59,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:58:59,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:59,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:58:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:59,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 18:58:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:59,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:59,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:58:59,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259736325] [2023-04-01 18:58:59,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259736325] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:58:59,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707867311] [2023-04-01 18:58:59,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:58:59,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:58:59,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:58:59,689 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) [2023-04-01 18:58:59,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 18:58:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:58:59,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 18:58:59,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:58:59,767 INFO L350 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 [2023-04-01 18:58:59,777 INFO L350 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 [2023-04-01 18:58:59,786 INFO L350 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 [2023-04-01 18:58:59,795 INFO L350 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 [2023-04-01 18:58:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:58:59,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:59:00,175 INFO L350 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 17 treesize of output 15 [2023-04-01 18:59:00,177 INFO L350 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 [2023-04-01 18:59:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:59:00,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707867311] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:59:00,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:59:00,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 12] total 24 [2023-04-01 18:59:00,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210294033] [2023-04-01 18:59:00,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:59:00,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 18:59:00,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:59:00,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 18:59:00,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-04-01 18:59:00,202 INFO L87 Difference]: Start difference. First operand 121 states and 163 transitions. Second operand has 24 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 6 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 18:59:01,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:59:01,016 INFO L93 Difference]: Finished difference Result 280 states and 361 transitions. [2023-04-01 18:59:01,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 18:59:01,016 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 6 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2023-04-01 18:59:01,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:59:01,018 INFO L225 Difference]: With dead ends: 280 [2023-04-01 18:59:01,018 INFO L226 Difference]: Without dead ends: 278 [2023-04-01 18:59:01,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=1321, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 18:59:01,019 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 101 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 18:59:01,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 205 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 18:59:01,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2023-04-01 18:59:01,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 177. [2023-04-01 18:59:01,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 157 states have (on average 1.3375796178343948) internal successors, (210), 161 states have internal predecessors, (210), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:59:01,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 231 transitions. [2023-04-01 18:59:01,043 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 231 transitions. Word has length 38 [2023-04-01 18:59:01,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:59:01,043 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 231 transitions. [2023-04-01 18:59:01,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 6 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 18:59:01,043 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 231 transitions. [2023-04-01 18:59:01,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 18:59:01,044 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:59:01,044 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:59:01,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 18:59:01,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:01,250 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:59:01,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:59:01,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1602894729, now seen corresponding path program 1 times [2023-04-01 18:59:01,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:59:01,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748827600] [2023-04-01 18:59:01,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:01,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:59:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:01,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:59:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:01,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:59:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:01,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-04-01 18:59:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:59:01,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:59:01,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748827600] [2023-04-01 18:59:01,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748827600] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:59:01,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:59:01,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:59:01,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072465397] [2023-04-01 18:59:01,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:59:01,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:59:01,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:59:01,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:59:01,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:59:01,307 INFO L87 Difference]: Start difference. First operand 177 states and 231 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:59:01,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:59:01,377 INFO L93 Difference]: Finished difference Result 195 states and 250 transitions. [2023-04-01 18:59:01,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:59:01,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2023-04-01 18:59:01,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:59:01,380 INFO L225 Difference]: With dead ends: 195 [2023-04-01 18:59:01,380 INFO L226 Difference]: Without dead ends: 152 [2023-04-01 18:59:01,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:59:01,383 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:59:01,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 44 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:59:01,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-04-01 18:59:01,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2023-04-01 18:59:01,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 132 states have (on average 1.3181818181818181) internal successors, (174), 136 states have internal predecessors, (174), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 6 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:59:01,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 195 transitions. [2023-04-01 18:59:01,405 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 195 transitions. Word has length 45 [2023-04-01 18:59:01,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:59:01,407 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 195 transitions. [2023-04-01 18:59:01,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:59:01,407 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 195 transitions. [2023-04-01 18:59:01,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 18:59:01,408 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:59:01,408 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:59:01,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-01 18:59:01,409 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:59:01,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:59:01,409 INFO L85 PathProgramCache]: Analyzing trace with hash 646899333, now seen corresponding path program 2 times [2023-04-01 18:59:01,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:59:01,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156570731] [2023-04-01 18:59:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:01,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:59:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:01,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:59:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:01,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:59:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:01,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 18:59:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:01,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-04-01 18:59:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:59:01,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:59:01,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156570731] [2023-04-01 18:59:01,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156570731] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:59:01,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777690134] [2023-04-01 18:59:01,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:59:01,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:01,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:59:01,794 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) [2023-04-01 18:59:01,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 18:59:01,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:59:01,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:59:01,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 18:59:01,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:59:01,985 INFO L350 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 [2023-04-01 18:59:02,019 INFO L350 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 [2023-04-01 18:59:02,036 INFO L350 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 [2023-04-01 18:59:02,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:59:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:59:02,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:59:02,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-04-01 18:59:02,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-04-01 18:59:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:59:02,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777690134] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:59:02,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:59:02,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 27 [2023-04-01 18:59:02,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332834786] [2023-04-01 18:59:02,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:59:02,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-04-01 18:59:02,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:59:02,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-04-01 18:59:02,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2023-04-01 18:59:02,579 INFO L87 Difference]: Start difference. First operand 152 states and 195 transitions. Second operand has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:59:04,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:06,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:08,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:10,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:13,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:15,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:17,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:19,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:21,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 18:59:22,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:59:22,555 INFO L93 Difference]: Finished difference Result 474 states and 607 transitions. [2023-04-01 18:59:22,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-04-01 18:59:22,556 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 47 [2023-04-01 18:59:22,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:59:22,557 INFO L225 Difference]: With dead ends: 474 [2023-04-01 18:59:22,557 INFO L226 Difference]: Without dead ends: 387 [2023-04-01 18:59:22,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=670, Invalid=3112, Unknown=0, NotChecked=0, Total=3782 [2023-04-01 18:59:22,560 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 368 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 241 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2023-04-01 18:59:22,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 284 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 1191 Invalid, 9 Unknown, 0 Unchecked, 18.9s Time] [2023-04-01 18:59:22,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-04-01 18:59:22,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 220. [2023-04-01 18:59:22,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 189 states have (on average 1.2433862433862435) internal successors, (235), 196 states have internal predecessors, (235), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (17), 10 states have call predecessors, (17), 17 states have call successors, (17) [2023-04-01 18:59:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 270 transitions. [2023-04-01 18:59:22,595 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 270 transitions. Word has length 47 [2023-04-01 18:59:22,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:59:22,595 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 270 transitions. [2023-04-01 18:59:22,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.962962962962963) internal successors, (80), 26 states have internal predecessors, (80), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 18:59:22,596 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 270 transitions. [2023-04-01 18:59:22,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 18:59:22,597 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:59:22,597 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:59:22,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 18:59:22,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 18:59:22,802 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:59:22,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:59:22,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1537632441, now seen corresponding path program 1 times [2023-04-01 18:59:22,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:59:22,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891500177] [2023-04-01 18:59:22,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:22,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:59:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:23,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:59:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:23,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:59:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:23,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 18:59:23,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:23,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-04-01 18:59:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 18:59:23,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:59:23,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891500177] [2023-04-01 18:59:23,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891500177] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:59:23,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091280308] [2023-04-01 18:59:23,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:23,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:23,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:59:23,079 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) [2023-04-01 18:59:23,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 18:59:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:23,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-01 18:59:23,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:59:23,190 INFO L350 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 [2023-04-01 18:59:23,213 INFO L350 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 [2023-04-01 18:59:23,224 INFO L350 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 [2023-04-01 18:59:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:59:23,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:59:23,706 INFO L350 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 17 treesize of output 15 [2023-04-01 18:59:23,708 INFO L350 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 [2023-04-01 18:59:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:59:23,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091280308] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:59:23,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:59:23,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 13] total 28 [2023-04-01 18:59:23,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186877237] [2023-04-01 18:59:23,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:59:23,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 18:59:23,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:59:23,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 18:59:23,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2023-04-01 18:59:23,721 INFO L87 Difference]: Start difference. First operand 220 states and 270 transitions. Second operand has 28 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 8 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 18:59:24,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:59:24,955 INFO L93 Difference]: Finished difference Result 430 states and 526 transitions. [2023-04-01 18:59:24,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-01 18:59:24,956 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 8 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 47 [2023-04-01 18:59:24,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:59:24,958 INFO L225 Difference]: With dead ends: 430 [2023-04-01 18:59:24,958 INFO L226 Difference]: Without dead ends: 428 [2023-04-01 18:59:24,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=331, Invalid=2119, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 18:59:24,960 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 123 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-01 18:59:24,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 305 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1356 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-01 18:59:24,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2023-04-01 18:59:25,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 309. [2023-04-01 18:59:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 264 states have (on average 1.246212121212121) internal successors, (329), 276 states have internal predecessors, (329), 26 states have call successors, (26), 19 states have call predecessors, (26), 18 states have return successors, (25), 13 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-01 18:59:25,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 380 transitions. [2023-04-01 18:59:25,004 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 380 transitions. Word has length 47 [2023-04-01 18:59:25,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:59:25,004 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 380 transitions. [2023-04-01 18:59:25,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.08) internal successors, (77), 25 states have internal predecessors, (77), 8 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-04-01 18:59:25,005 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 380 transitions. [2023-04-01 18:59:25,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 18:59:25,006 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:59:25,006 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:59:25,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 18:59:25,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:25,211 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:59:25,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:59:25,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1648920034, now seen corresponding path program 1 times [2023-04-01 18:59:25,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:59:25,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603721053] [2023-04-01 18:59:25,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:25,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:59:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:25,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:59:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:25,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:59:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:25,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-04-01 18:59:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:25,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-04-01 18:59:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 18:59:25,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:59:25,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603721053] [2023-04-01 18:59:25,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603721053] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:59:25,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:59:25,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:59:25,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623315503] [2023-04-01 18:59:25,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:59:25,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:59:25,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:59:25,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:59:25,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:59:25,255 INFO L87 Difference]: Start difference. First operand 309 states and 380 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:59:25,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:59:25,380 INFO L93 Difference]: Finished difference Result 479 states and 593 transitions. [2023-04-01 18:59:25,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:59:25,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2023-04-01 18:59:25,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:59:25,384 INFO L225 Difference]: With dead ends: 479 [2023-04-01 18:59:25,384 INFO L226 Difference]: Without dead ends: 355 [2023-04-01 18:59:25,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:59:25,386 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:59:25,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 46 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:59:25,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-04-01 18:59:25,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 321. [2023-04-01 18:59:25,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 276 states have (on average 1.2282608695652173) internal successors, (339), 288 states have internal predecessors, (339), 26 states have call successors, (26), 19 states have call predecessors, (26), 18 states have return successors, (25), 13 states have call predecessors, (25), 25 states have call successors, (25) [2023-04-01 18:59:25,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 390 transitions. [2023-04-01 18:59:25,438 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 390 transitions. Word has length 54 [2023-04-01 18:59:25,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:59:25,438 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 390 transitions. [2023-04-01 18:59:25,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:59:25,438 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 390 transitions. [2023-04-01 18:59:25,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 18:59:25,439 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:59:25,439 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:59:25,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-01 18:59:25,439 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:59:25,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:59:25,440 INFO L85 PathProgramCache]: Analyzing trace with hash -190916058, now seen corresponding path program 3 times [2023-04-01 18:59:25,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:59:25,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426526529] [2023-04-01 18:59:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:25,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:59:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:25,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:59:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:25,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:59:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:25,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 18:59:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:25,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-04-01 18:59:25,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:25,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 18:59:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:59:25,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:59:25,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426526529] [2023-04-01 18:59:25,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426526529] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:59:25,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508675150] [2023-04-01 18:59:25,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:59:25,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:25,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:59:25,813 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) [2023-04-01 18:59:25,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 18:59:25,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 18:59:25,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:59:25,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 22 conjunts are in the unsatisfiable core [2023-04-01 18:59:25,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:59:25,976 INFO L350 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 [2023-04-01 18:59:26,000 INFO L350 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 [2023-04-01 18:59:26,014 INFO L350 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 [2023-04-01 18:59:26,025 INFO L350 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 [2023-04-01 18:59:26,034 INFO L350 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 [2023-04-01 18:59:26,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:59:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 18:59:26,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:59:26,266 INFO L350 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 17 treesize of output 15 [2023-04-01 18:59:26,269 INFO L350 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 22 treesize of output 20 [2023-04-01 18:59:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 18:59:26,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508675150] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:59:26,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:59:26,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 21 [2023-04-01 18:59:26,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976635337] [2023-04-01 18:59:26,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:59:26,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 18:59:26,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:59:26,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 18:59:26,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-04-01 18:59:26,315 INFO L87 Difference]: Start difference. First operand 321 states and 390 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 18:59:27,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:59:27,394 INFO L93 Difference]: Finished difference Result 612 states and 747 transitions. [2023-04-01 18:59:27,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-01 18:59:27,395 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 56 [2023-04-01 18:59:27,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:59:27,397 INFO L225 Difference]: With dead ends: 612 [2023-04-01 18:59:27,397 INFO L226 Difference]: Without dead ends: 499 [2023-04-01 18:59:27,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 109 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=461, Invalid=2089, Unknown=0, NotChecked=0, Total=2550 [2023-04-01 18:59:27,399 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 325 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 18:59:27,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 233 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 18:59:27,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-04-01 18:59:27,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 331. [2023-04-01 18:59:27,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 284 states have (on average 1.2077464788732395) internal successors, (343), 297 states have internal predecessors, (343), 28 states have call successors, (28), 19 states have call predecessors, (28), 18 states have return successors, (27), 14 states have call predecessors, (27), 27 states have call successors, (27) [2023-04-01 18:59:27,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 398 transitions. [2023-04-01 18:59:27,456 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 398 transitions. Word has length 56 [2023-04-01 18:59:27,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:59:27,456 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 398 transitions. [2023-04-01 18:59:27,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2023-04-01 18:59:27,457 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 398 transitions. [2023-04-01 18:59:27,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 18:59:27,458 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:59:27,458 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:59:27,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 18:59:27,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:27,664 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:59:27,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:59:27,664 INFO L85 PathProgramCache]: Analyzing trace with hash -945515742, now seen corresponding path program 1 times [2023-04-01 18:59:27,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:59:27,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837545586] [2023-04-01 18:59:27,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:27,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:59:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:27,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:59:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:27,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:59:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:28,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 18:59:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:28,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-04-01 18:59:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:28,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 18:59:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 18:59:28,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:59:28,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837545586] [2023-04-01 18:59:28,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837545586] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:59:28,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295713707] [2023-04-01 18:59:28,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:28,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:28,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:59:28,011 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) [2023-04-01 18:59:28,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 18:59:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:28,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-01 18:59:28,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:59:28,111 INFO L350 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 [2023-04-01 18:59:28,120 INFO L350 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 [2023-04-01 18:59:28,369 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 18:59:28,371 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 18:59:28,371 INFO L350 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 33 treesize of output 20 [2023-04-01 18:59:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 18:59:28,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:59:28,631 INFO L350 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 17 treesize of output 15 [2023-04-01 18:59:28,633 INFO L350 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 [2023-04-01 18:59:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 18:59:28,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295713707] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:59:28,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:59:28,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 14] total 28 [2023-04-01 18:59:28,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345841096] [2023-04-01 18:59:28,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:59:28,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 18:59:28,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:59:28,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 18:59:28,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2023-04-01 18:59:28,668 INFO L87 Difference]: Start difference. First operand 331 states and 398 transitions. Second operand has 28 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 10 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2023-04-01 18:59:30,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:59:30,612 INFO L93 Difference]: Finished difference Result 716 states and 866 transitions. [2023-04-01 18:59:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 18:59:30,612 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 10 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) Word has length 56 [2023-04-01 18:59:30,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:59:30,618 INFO L225 Difference]: With dead ends: 716 [2023-04-01 18:59:30,619 INFO L226 Difference]: Without dead ends: 714 [2023-04-01 18:59:30,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 104 SyntacticMatches, 9 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=571, Invalid=3719, Unknown=0, NotChecked=0, Total=4290 [2023-04-01 18:59:30,622 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 130 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:59:30,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 359 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 2112 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-04-01 18:59:30,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2023-04-01 18:59:30,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 473. [2023-04-01 18:59:30,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 404 states have (on average 1.2128712871287128) internal successors, (490), 424 states have internal predecessors, (490), 43 states have call successors, (43), 26 states have call predecessors, (43), 25 states have return successors, (42), 22 states have call predecessors, (42), 42 states have call successors, (42) [2023-04-01 18:59:30,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 575 transitions. [2023-04-01 18:59:30,709 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 575 transitions. Word has length 56 [2023-04-01 18:59:30,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:59:30,710 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 575 transitions. [2023-04-01 18:59:30,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 10 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (12), 8 states have call predecessors, (12), 9 states have call successors, (12) [2023-04-01 18:59:30,710 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 575 transitions. [2023-04-01 18:59:30,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-01 18:59:30,711 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:59:30,712 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:59:30,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 18:59:30,917 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,SelfDestructingSolverStorable15 [2023-04-01 18:59:30,918 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:59:30,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:59:30,918 INFO L85 PathProgramCache]: Analyzing trace with hash -229198487, now seen corresponding path program 2 times [2023-04-01 18:59:30,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:59:30,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081370030] [2023-04-01 18:59:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:30,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:59:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:30,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:59:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:30,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:59:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:30,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-04-01 18:59:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:30,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2023-04-01 18:59:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:30,967 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-04-01 18:59:30,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:59:30,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081370030] [2023-04-01 18:59:30,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081370030] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:59:30,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:59:30,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:59:30,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47539062] [2023-04-01 18:59:30,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:59:30,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:59:30,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:59:30,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:59:30,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:59:30,970 INFO L87 Difference]: Start difference. First operand 473 states and 575 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:59:31,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:59:31,095 INFO L93 Difference]: Finished difference Result 530 states and 639 transitions. [2023-04-01 18:59:31,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:59:31,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2023-04-01 18:59:31,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:59:31,098 INFO L225 Difference]: With dead ends: 530 [2023-04-01 18:59:31,098 INFO L226 Difference]: Without dead ends: 389 [2023-04-01 18:59:31,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:59:31,099 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 17 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:59:31,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 61 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:59:31,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2023-04-01 18:59:31,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 372. [2023-04-01 18:59:31,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 317 states have (on average 1.2018927444794953) internal successors, (381), 332 states have internal predecessors, (381), 34 states have call successors, (34), 21 states have call predecessors, (34), 20 states have return successors, (33), 18 states have call predecessors, (33), 33 states have call successors, (33) [2023-04-01 18:59:31,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 448 transitions. [2023-04-01 18:59:31,154 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 448 transitions. Word has length 61 [2023-04-01 18:59:31,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:59:31,154 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 448 transitions. [2023-04-01 18:59:31,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:59:31,154 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 448 transitions. [2023-04-01 18:59:31,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 18:59:31,156 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:59:31,156 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:59:31,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-01 18:59:31,156 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:59:31,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:59:31,156 INFO L85 PathProgramCache]: Analyzing trace with hash -113196633, now seen corresponding path program 4 times [2023-04-01 18:59:31,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:59:31,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538673747] [2023-04-01 18:59:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:31,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:59:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:31,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:59:31,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:31,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:59:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:31,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 18:59:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:31,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-04-01 18:59:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:31,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 18:59:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:31,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-04-01 18:59:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 18:59:31,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:59:31,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538673747] [2023-04-01 18:59:31,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538673747] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:59:31,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393772531] [2023-04-01 18:59:31,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:59:31,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:31,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:59:31,432 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) [2023-04-01 18:59:31,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 18:59:31,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:59:31,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:59:31,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 33 conjunts are in the unsatisfiable core [2023-04-01 18:59:31,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:59:31,561 INFO L350 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 [2023-04-01 18:59:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 18:59:32,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:59:32,125 INFO L350 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 17 treesize of output 15 [2023-04-01 18:59:32,127 INFO L350 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 [2023-04-01 18:59:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 18:59:32,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393772531] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:59:32,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:59:32,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 12] total 28 [2023-04-01 18:59:32,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852965187] [2023-04-01 18:59:32,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:59:32,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 18:59:32,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:59:32,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 18:59:32,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2023-04-01 18:59:32,146 INFO L87 Difference]: Start difference. First operand 372 states and 448 transitions. Second operand has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 25 states have internal predecessors, (88), 12 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-01 18:59:34,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:59:34,775 INFO L93 Difference]: Finished difference Result 1031 states and 1245 transitions. [2023-04-01 18:59:34,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-04-01 18:59:34,776 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 25 states have internal predecessors, (88), 12 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 65 [2023-04-01 18:59:34,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:59:34,780 INFO L225 Difference]: With dead ends: 1031 [2023-04-01 18:59:34,780 INFO L226 Difference]: Without dead ends: 1029 [2023-04-01 18:59:34,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 124 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=840, Invalid=6132, Unknown=0, NotChecked=0, Total=6972 [2023-04-01 18:59:34,783 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 151 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 3202 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 3514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 3202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 18:59:34,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 501 Invalid, 3514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 3202 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 18:59:34,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2023-04-01 18:59:34,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 696. [2023-04-01 18:59:34,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 585 states have (on average 1.2017094017094017) internal successors, (703), 615 states have internal predecessors, (703), 72 states have call successors, (72), 39 states have call predecessors, (72), 38 states have return successors, (71), 41 states have call predecessors, (71), 71 states have call successors, (71) [2023-04-01 18:59:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 846 transitions. [2023-04-01 18:59:34,922 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 846 transitions. Word has length 65 [2023-04-01 18:59:34,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:59:34,923 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 846 transitions. [2023-04-01 18:59:34,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 25 states have internal predecessors, (88), 12 states have call successors, (16), 5 states have call predecessors, (16), 3 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2023-04-01 18:59:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 846 transitions. [2023-04-01 18:59:34,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-04-01 18:59:34,925 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:59:34,925 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:59:34,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 18:59:35,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-04-01 18:59:35,131 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:59:35,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:59:35,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1984035799, now seen corresponding path program 1 times [2023-04-01 18:59:35,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:59:35,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697006602] [2023-04-01 18:59:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:35,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:59:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:35,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:59:35,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:35,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:59:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:35,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 18:59:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:35,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-04-01 18:59:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:35,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 18:59:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:35,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-04-01 18:59:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:35,444 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 18:59:35,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:59:35,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697006602] [2023-04-01 18:59:35,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697006602] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:59:35,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297640430] [2023-04-01 18:59:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:35,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:35,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:59:35,449 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) [2023-04-01 18:59:35,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 18:59:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:35,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 21 conjunts are in the unsatisfiable core [2023-04-01 18:59:35,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:59:35,569 INFO L350 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 [2023-04-01 18:59:35,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 18:59:35,776 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 18:59:35,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:59:35,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-04-01 18:59:35,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2023-04-01 18:59:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 18:59:35,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297640430] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:59:35,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:59:35,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 28 [2023-04-01 18:59:35,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502205869] [2023-04-01 18:59:35,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:59:35,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 18:59:35,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:59:35,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 18:59:35,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2023-04-01 18:59:35,967 INFO L87 Difference]: Start difference. First operand 696 states and 846 transitions. Second operand has 28 states, 28 states have (on average 3.607142857142857) internal successors, (101), 27 states have internal predecessors, (101), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-04-01 18:59:38,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:59:38,638 INFO L93 Difference]: Finished difference Result 1186 states and 1437 transitions. [2023-04-01 18:59:38,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-04-01 18:59:38,639 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.607142857142857) internal successors, (101), 27 states have internal predecessors, (101), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 65 [2023-04-01 18:59:38,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:59:38,642 INFO L225 Difference]: With dead ends: 1186 [2023-04-01 18:59:38,643 INFO L226 Difference]: Without dead ends: 1128 [2023-04-01 18:59:38,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1044, Invalid=5762, Unknown=0, NotChecked=0, Total=6806 [2023-04-01 18:59:38,645 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 338 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 18:59:38,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 316 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 18:59:38,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2023-04-01 18:59:38,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 796. [2023-04-01 18:59:38,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 662 states have (on average 1.188821752265861) internal successors, (787), 699 states have internal predecessors, (787), 95 states have call successors, (95), 39 states have call predecessors, (95), 38 states have return successors, (94), 57 states have call predecessors, (94), 94 states have call successors, (94) [2023-04-01 18:59:38,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 976 transitions. [2023-04-01 18:59:38,817 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 976 transitions. Word has length 65 [2023-04-01 18:59:38,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:59:38,817 INFO L495 AbstractCegarLoop]: Abstraction has 796 states and 976 transitions. [2023-04-01 18:59:38,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.607142857142857) internal successors, (101), 27 states have internal predecessors, (101), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2023-04-01 18:59:38,818 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 976 transitions. [2023-04-01 18:59:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-04-01 18:59:38,823 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:59:38,823 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:59:38,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 18:59:39,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:39,029 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:59:39,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:59:39,029 INFO L85 PathProgramCache]: Analyzing trace with hash -560700092, now seen corresponding path program 5 times [2023-04-01 18:59:39,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:59:39,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224411816] [2023-04-01 18:59:39,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:39,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:59:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:39,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:59:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:39,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:59:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:39,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 18:59:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:39,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-04-01 18:59:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:39,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-04-01 18:59:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:39,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-04-01 18:59:39,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:39,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-04-01 18:59:39,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 54 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 18:59:39,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:59:39,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224411816] [2023-04-01 18:59:39,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224411816] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:59:39,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23869619] [2023-04-01 18:59:39,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:59:39,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:39,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:59:39,384 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) [2023-04-01 18:59:39,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 18:59:39,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-04-01 18:59:39,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:59:39,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 18:59:39,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:59:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 18:59:39,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:59:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 75 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 18:59:40,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23869619] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:59:40,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:59:40,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 35 [2023-04-01 18:59:40,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438283121] [2023-04-01 18:59:40,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:59:40,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-01 18:59:40,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:59:40,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-01 18:59:40,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 18:59:40,159 INFO L87 Difference]: Start difference. First operand 796 states and 976 transitions. Second operand has 35 states, 35 states have (on average 3.4) internal successors, (119), 34 states have internal predecessors, (119), 20 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-04-01 18:59:40,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:59:40,822 INFO L93 Difference]: Finished difference Result 1343 states and 1596 transitions. [2023-04-01 18:59:40,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 18:59:40,823 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.4) internal successors, (119), 34 states have internal predecessors, (119), 20 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 74 [2023-04-01 18:59:40,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:59:40,826 INFO L225 Difference]: With dead ends: 1343 [2023-04-01 18:59:40,826 INFO L226 Difference]: Without dead ends: 869 [2023-04-01 18:59:40,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=418, Invalid=1388, Unknown=0, NotChecked=0, Total=1806 [2023-04-01 18:59:40,828 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 252 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:59:40,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 100 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:59:40,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2023-04-01 18:59:41,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 813. [2023-04-01 18:59:41,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 679 states have (on average 1.175257731958763) internal successors, (798), 716 states have internal predecessors, (798), 95 states have call successors, (95), 39 states have call predecessors, (95), 38 states have return successors, (94), 57 states have call predecessors, (94), 94 states have call successors, (94) [2023-04-01 18:59:41,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 987 transitions. [2023-04-01 18:59:41,006 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 987 transitions. Word has length 74 [2023-04-01 18:59:41,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:59:41,006 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 987 transitions. [2023-04-01 18:59:41,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.4) internal successors, (119), 34 states have internal predecessors, (119), 20 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2023-04-01 18:59:41,007 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 987 transitions. [2023-04-01 18:59:41,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-04-01 18:59:41,009 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:59:41,010 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:59:41,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 18:59:41,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:41,215 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:59:41,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:59:41,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1178248331, now seen corresponding path program 1 times [2023-04-01 18:59:41,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:59:41,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891132451] [2023-04-01 18:59:41,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:41,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:59:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:41,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:59:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:41,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:59:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:41,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-04-01 18:59:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:41,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-04-01 18:59:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:41,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-04-01 18:59:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 18:59:41,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:59:41,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891132451] [2023-04-01 18:59:41,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891132451] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:59:41,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:59:41,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:59:41,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99688765] [2023-04-01 18:59:41,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:59:41,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:59:41,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:59:41,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:59:41,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:59:41,267 INFO L87 Difference]: Start difference. First operand 813 states and 987 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:59:41,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:59:41,460 INFO L93 Difference]: Finished difference Result 1042 states and 1263 transitions. [2023-04-01 18:59:41,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:59:41,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 77 [2023-04-01 18:59:41,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:59:41,494 INFO L225 Difference]: With dead ends: 1042 [2023-04-01 18:59:41,494 INFO L226 Difference]: Without dead ends: 741 [2023-04-01 18:59:41,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:59:41,495 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:59:41,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 61 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:59:41,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2023-04-01 18:59:41,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 719. [2023-04-01 18:59:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 594 states have (on average 1.1565656565656566) internal successors, (687), 628 states have internal predecessors, (687), 86 states have call successors, (86), 39 states have call predecessors, (86), 38 states have return successors, (85), 51 states have call predecessors, (85), 85 states have call successors, (85) [2023-04-01 18:59:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 858 transitions. [2023-04-01 18:59:41,661 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 858 transitions. Word has length 77 [2023-04-01 18:59:41,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:59:41,661 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 858 transitions. [2023-04-01 18:59:41,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 18:59:41,661 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 858 transitions. [2023-04-01 18:59:41,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-04-01 18:59:41,663 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:59:41,663 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:59:41,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-04-01 18:59:41,664 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:59:41,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:59:41,664 INFO L85 PathProgramCache]: Analyzing trace with hash 948468617, now seen corresponding path program 6 times [2023-04-01 18:59:41,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:59:41,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688130310] [2023-04-01 18:59:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:59:41,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:59:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:42,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:59:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:42,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-01 18:59:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:42,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-04-01 18:59:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:42,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-04-01 18:59:42,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:42,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-04-01 18:59:42,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:42,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-04-01 18:59:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:42,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-04-01 18:59:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:59:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 10 proven. 74 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 18:59:42,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:59:42,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688130310] [2023-04-01 18:59:42,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688130310] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:59:42,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651993476] [2023-04-01 18:59:42,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 18:59:42,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:59:42,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:59:42,131 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) [2023-04-01 18:59:42,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 18:59:42,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-04-01 18:59:42,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:59:42,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-01 18:59:42,357 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:59:42,374 INFO L350 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 [2023-04-01 18:59:42,381 INFO L350 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 [2023-04-01 18:59:42,390 INFO L350 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 [2023-04-01 18:59:42,398 INFO L350 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 [2023-04-01 18:59:42,406 INFO L350 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 [2023-04-01 19:00:26,742 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 19:00:26,742 INFO L350 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 42 treesize of output 20 [2023-04-01 19:00:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 9 proven. 87 refuted. 13 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 19:00:26,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:00:31,001 INFO L350 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 17 treesize of output 15 [2023-04-01 19:00:31,003 INFO L350 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 [2023-04-01 19:00:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 18 proven. 78 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-04-01 19:00:31,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651993476] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:00:31,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:00:31,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 17] total 31 [2023-04-01 19:00:31,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694074230] [2023-04-01 19:00:31,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:00:31,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-01 19:00:31,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:00:31,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-01 19:00:31,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=805, Unknown=13, NotChecked=0, Total=930 [2023-04-01 19:00:31,027 INFO L87 Difference]: Start difference. First operand 719 states and 858 transitions. Second operand has 31 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 13 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2023-04-01 19:00:37,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:00:47,464 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:00:49,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:00:53,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:00:55,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:00:57,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:00:59,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:01:12,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:01:20,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:01:31,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:01:33,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:01:46,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:01:54,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:01:56,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:02:04,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:02:06,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:02:19,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:02:21,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:02:23,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:02:25,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:02:27,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:02:29,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:02:31,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:02:33,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:02:47,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:02:49,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:02:55,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:02:57,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:03:04,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:03:08,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:03:10,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:03:16,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]