/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-cav19/array_min_and_copy_shift_sum_add.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:28:45,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:28:45,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:28:45,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:28:45,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 22:28:45,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 22:28:45,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 22:28:45,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 22:28:45,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 22:28:45,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 22:28:45,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 22:28:45,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 22:28:45,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 22:28:45,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 22:28:45,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 22:28:45,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 22:28:45,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 22:28:45,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 22:28:45,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 22:28:45,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 22:28:45,659 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 [2023-03-30 22:28:45,681 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:28:45,681 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:28:45,681 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:28:45,682 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:28:45,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:28:45,682 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:28:45,682 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:28:45,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:28:45,683 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:28:45,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:28:45,683 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:28:45,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:28:45,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:28:45,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:28:45,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:28:45,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:28:45,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:28:45,683 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:28:45,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:28:45,683 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:28:45,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:28:45,684 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:28:45,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:28:45,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:28:45,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:28:45,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:28:45,684 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:28:45,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:28:45,684 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:28:45,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:28:45,687 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:28:45,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:28:45,687 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:28:45,687 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:28:45,687 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:28:45,687 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:28:45,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:28:45,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:28:45,890 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:28:45,891 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:28:45,891 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:28:45,892 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2023-03-30 22:28:46,893 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:28:47,055 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:28:47,055 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2023-03-30 22:28:47,060 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aee82c25b/ee5824b4f1c748dfa6ad95297ad07714/FLAGe9bec867c [2023-03-30 22:28:47,069 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aee82c25b/ee5824b4f1c748dfa6ad95297ad07714 [2023-03-30 22:28:47,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:28:47,071 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:28:47,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:28:47,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:28:47,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:28:47,074 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:28:47" (1/1) ... [2023-03-30 22:28:47,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10f7da5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:28:47, skipping insertion in model container [2023-03-30 22:28:47,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:28:47" (1/1) ... [2023-03-30 22:28:47,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:28:47,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:28:47,191 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-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2023-03-30 22:28:47,206 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:28:47,212 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:28:47,222 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-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2023-03-30 22:28:47,233 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:28:47,243 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:28:47,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:28:47 WrapperNode [2023-03-30 22:28:47,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:28:47,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:28:47,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:28:47,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:28:47,251 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:28:47" (1/1) ... [2023-03-30 22:28:47,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:28:47" (1/1) ... [2023-03-30 22:28:47,261 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:28:47" (1/1) ... [2023-03-30 22:28:47,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:28:47" (1/1) ... [2023-03-30 22:28:47,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:28:47" (1/1) ... [2023-03-30 22:28:47,274 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:28:47" (1/1) ... [2023-03-30 22:28:47,279 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:28:47" (1/1) ... [2023-03-30 22:28:47,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:28:47" (1/1) ... [2023-03-30 22:28:47,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:28:47,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:28:47,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:28:47,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:28:47,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:28:47" (1/1) ... [2023-03-30 22:28:47,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:28:47,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:28:47,318 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-30 22:28:47,333 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 [2023-03-30 22:28:47,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:28:47,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:28:47,357 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:28:47,357 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-30 22:28:47,357 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:28:47,357 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:28:47,357 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:28:47,357 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:28:47,357 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:28:47,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:28:47,358 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-30 22:28:47,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:28:47,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 22:28:47,358 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:28:47,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-30 22:28:47,358 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:28:47,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:28:47,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:28:47,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:28:47,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:28:47,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:28:47,403 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:28:47,404 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:28:47,512 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:28:47,516 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:28:47,516 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-30 22:28:47,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:28:47 BoogieIcfgContainer [2023-03-30 22:28:47,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:28:47,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:28:47,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:28:47,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:28:47,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:28:47" (1/3) ... [2023-03-30 22:28:47,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242a792d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:28:47, skipping insertion in model container [2023-03-30 22:28:47,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:28:47" (2/3) ... [2023-03-30 22:28:47,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242a792d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:28:47, skipping insertion in model container [2023-03-30 22:28:47,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:28:47" (3/3) ... [2023-03-30 22:28:47,529 INFO L112 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2023-03-30 22:28:47,539 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:28:47,539 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:28:47,566 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:28:47,570 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;@6b121a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:28:47,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:28:47,573 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 27 states have internal predecessors, (37), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 22:28:47,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-30 22:28:47,586 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:28:47,586 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] [2023-03-30 22:28:47,586 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:28:47,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:28:47,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1713270924, now seen corresponding path program 1 times [2023-03-30 22:28:47,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:28:47,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505543874] [2023-03-30 22:28:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:28:47,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:28:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:47,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:28:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:47,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:28:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:47,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-03-30 22:28:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:28:47,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:28:47,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505543874] [2023-03-30 22:28:47,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505543874] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:28:47,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:28:47,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:28:47,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530457853] [2023-03-30 22:28:47,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:28:47,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:28:47,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:28:47,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:28:47,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:28:47,760 INFO L87 Difference]: Start difference. First operand has 38 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 27 states have internal predecessors, (37), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:28:47,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:28:47,849 INFO L93 Difference]: Finished difference Result 69 states and 94 transitions. [2023-03-30 22:28:47,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:28:47,851 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-03-30 22:28:47,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:28:47,855 INFO L225 Difference]: With dead ends: 69 [2023-03-30 22:28:47,855 INFO L226 Difference]: Without dead ends: 31 [2023-03-30 22:28:47,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:28:47,862 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:28:47,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 10 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:28:47,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-30 22:28:47,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-03-30 22:28:47,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:28:47,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-03-30 22:28:47,910 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 27 [2023-03-30 22:28:47,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:28:47,910 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-03-30 22:28:47,910 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-03-30 22:28:47,910 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-03-30 22:28:47,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-03-30 22:28:47,911 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:28:47,912 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] [2023-03-30 22:28:47,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:28:47,912 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:28:47,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:28:47,913 INFO L85 PathProgramCache]: Analyzing trace with hash -729649300, now seen corresponding path program 1 times [2023-03-30 22:28:47,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:28:47,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796376562] [2023-03-30 22:28:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:28:47,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:28:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:48,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:28:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:48,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:28:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:48,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-03-30 22:28:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:28:48,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:28:48,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796376562] [2023-03-30 22:28:48,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796376562] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:28:48,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:28:48,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:28:48,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231263649] [2023-03-30 22:28:48,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:28:48,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 22:28:48,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:28:48,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 22:28:48,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:28:48,190 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-03-30 22:28:48,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:28:48,306 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2023-03-30 22:28:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-30 22:28:48,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 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 27 [2023-03-30 22:28:48,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:28:48,308 INFO L225 Difference]: With dead ends: 37 [2023-03-30 22:28:48,310 INFO L226 Difference]: Without dead ends: 32 [2023-03-30 22:28:48,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-03-30 22:28:48,318 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:28:48,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 22 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:28:48,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-03-30 22:28:48,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-03-30 22:28:48,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:28:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2023-03-30 22:28:48,324 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 27 [2023-03-30 22:28:48,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:28:48,325 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2023-03-30 22:28:48,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 4 states have internal predecessors, (16), 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) [2023-03-30 22:28:48,326 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2023-03-30 22:28:48,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-30 22:28:48,326 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:28:48,327 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] [2023-03-30 22:28:48,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:28:48,327 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:28:48,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:28:48,327 INFO L85 PathProgramCache]: Analyzing trace with hash -182907574, now seen corresponding path program 1 times [2023-03-30 22:28:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:28:48,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630747020] [2023-03-30 22:28:48,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:28:48,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:28:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:48,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:28:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:48,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:28:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:48,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-03-30 22:28:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-30 22:28:48,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:28:48,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630747020] [2023-03-30 22:28:48,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630747020] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:28:48,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:28:48,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 22:28:48,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656857428] [2023-03-30 22:28:48,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:28:48,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-30 22:28:48,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:28:48,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-30 22:28:48,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-30 22:28:48,467 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 22:28:48,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:28:48,576 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2023-03-30 22:28:48,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 22:28:48,576 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-03-30 22:28:48,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:28:48,577 INFO L225 Difference]: With dead ends: 56 [2023-03-30 22:28:48,577 INFO L226 Difference]: Without dead ends: 41 [2023-03-30 22:28:48,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:28:48,578 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 54 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:28:48,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 22 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:28:48,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-03-30 22:28:48,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2023-03-30 22:28:48,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-30 22:28:48,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-03-30 22:28:48,584 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 29 [2023-03-30 22:28:48,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:28:48,585 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-03-30 22:28:48,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-03-30 22:28:48,585 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-03-30 22:28:48,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-30 22:28:48,586 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:28:48,586 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2023-03-30 22:28:48,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 22:28:48,586 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:28:48,586 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:28:48,586 INFO L85 PathProgramCache]: Analyzing trace with hash 335597208, now seen corresponding path program 1 times [2023-03-30 22:28:48,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:28:48,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584589920] [2023-03-30 22:28:48,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:28:48,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:28:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:49,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:28:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:49,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:28:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:49,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-03-30 22:28:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:49,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-03-30 22:28:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:28:49,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:28:49,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584589920] [2023-03-30 22:28:49,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584589920] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:28:49,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671312309] [2023-03-30 22:28:49,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:28:49,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:49,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:28:49,119 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) [2023-03-30 22:28:49,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:28:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:49,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2023-03-30 22:28:49,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:28:49,395 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 [2023-03-30 22:28:49,442 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 [2023-03-30 22:28:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:28:49,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:28:49,552 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-30 22:28:49,552 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 18 treesize of output 15 [2023-03-30 22:28:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:28:49,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671312309] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:28:49,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:28:49,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2023-03-30 22:28:49,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404313531] [2023-03-30 22:28:49,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:28:49,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-03-30 22:28:49,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:28:49,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-03-30 22:28:49,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-03-30 22:28:49,590 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 21 states have internal predecessors, (56), 6 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-03-30 22:28:49,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:28:49,972 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2023-03-30 22:28:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-30 22:28:49,972 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 21 states have internal predecessors, (56), 6 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 41 [2023-03-30 22:28:49,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:28:49,973 INFO L225 Difference]: With dead ends: 60 [2023-03-30 22:28:49,973 INFO L226 Difference]: Without dead ends: 55 [2023-03-30 22:28:49,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2023-03-30 22:28:49,974 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 118 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:28:49,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 38 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:28:49,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-03-30 22:28:49,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2023-03-30 22:28:49,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 8 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 22:28:49,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-03-30 22:28:49,981 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 41 [2023-03-30 22:28:49,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:28:49,982 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-03-30 22:28:49,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 21 states have internal predecessors, (56), 6 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-03-30 22:28:49,982 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-03-30 22:28:49,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-30 22:28:49,983 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:28:49,983 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2023-03-30 22:28:49,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 22:28:50,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:50,188 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:28:50,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:28:50,188 INFO L85 PathProgramCache]: Analyzing trace with hash -944266470, now seen corresponding path program 1 times [2023-03-30 22:28:50,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:28:50,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841680317] [2023-03-30 22:28:50,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:28:50,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:28:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:50,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:28:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:50,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:28:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:50,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-03-30 22:28:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:50,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-03-30 22:28:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:28:50,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:28:50,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841680317] [2023-03-30 22:28:50,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841680317] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:28:50,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666997805] [2023-03-30 22:28:50,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:28:50,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:50,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:28:50,547 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) [2023-03-30 22:28:50,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:28:50,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:50,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjunts are in the unsatisfiable core [2023-03-30 22:28:50,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:28:50,711 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 [2023-03-30 22:28:50,750 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 [2023-03-30 22:28:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:28:50,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:28:52,877 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-30 22:28:52,878 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 18 treesize of output 15 [2023-03-30 22:28:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-30 22:28:52,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666997805] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:28:52,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:28:52,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2023-03-30 22:28:52,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983135048] [2023-03-30 22:28:52,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:28:52,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-03-30 22:28:52,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:28:52,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-03-30 22:28:52,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=590, Unknown=1, NotChecked=0, Total=702 [2023-03-30 22:28:52,908 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 24 states have internal predecessors, (56), 6 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-03-30 22:28:53,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:28:53,322 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2023-03-30 22:28:53,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-03-30 22:28:53,323 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 24 states have internal predecessors, (56), 6 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 41 [2023-03-30 22:28:53,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:28:53,324 INFO L225 Difference]: With dead ends: 74 [2023-03-30 22:28:53,324 INFO L226 Difference]: Without dead ends: 69 [2023-03-30 22:28:53,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=251, Invalid=1308, Unknown=1, NotChecked=0, Total=1560 [2023-03-30 22:28:53,325 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 111 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:28:53,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 56 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:28:53,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-03-30 22:28:53,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2023-03-30 22:28:53,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.275) internal successors, (51), 40 states have internal predecessors, (51), 8 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 22:28:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-03-30 22:28:53,333 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 41 [2023-03-30 22:28:53,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:28:53,334 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-03-30 22:28:53,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 24 states have internal predecessors, (56), 6 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-03-30 22:28:53,335 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-03-30 22:28:53,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-03-30 22:28:53,338 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:28:53,338 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2023-03-30 22:28:53,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 22:28:53,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:53,545 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:28:53,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:28:53,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1410154934, now seen corresponding path program 2 times [2023-03-30 22:28:53,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:28:53,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610564950] [2023-03-30 22:28:53,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:28:53,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:28:53,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:53,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:28:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:53,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:28:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:53,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-03-30 22:28:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:53,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-03-30 22:28:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-30 22:28:53,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:28:53,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610564950] [2023-03-30 22:28:53,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610564950] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:28:53,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936821670] [2023-03-30 22:28:53,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:28:53,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:53,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:28:53,653 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) [2023-03-30 22:28:53,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:28:53,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:28:53,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:28:53,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:28:53,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:28:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-30 22:28:53,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:28:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-30 22:28:53,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936821670] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:28:53,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:28:53,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2023-03-30 22:28:53,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868996826] [2023-03-30 22:28:53,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:28:53,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:28:53,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:28:53,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:28:53,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:28:53,809 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 22:28:54,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:28:54,023 INFO L93 Difference]: Finished difference Result 88 states and 111 transitions. [2023-03-30 22:28:54,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-30 22:28:54,024 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2023-03-30 22:28:54,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:28:54,028 INFO L225 Difference]: With dead ends: 88 [2023-03-30 22:28:54,029 INFO L226 Difference]: Without dead ends: 68 [2023-03-30 22:28:54,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2023-03-30 22:28:54,031 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 95 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:28:54,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 32 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:28:54,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-03-30 22:28:54,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2023-03-30 22:28:54,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 8 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 22:28:54,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2023-03-30 22:28:54,039 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 43 [2023-03-30 22:28:54,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:28:54,039 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2023-03-30 22:28:54,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 4 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-30 22:28:54,040 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2023-03-30 22:28:54,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-03-30 22:28:54,040 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:28:54,040 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-03-30 22:28:54,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:28:54,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:54,248 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:28:54,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:28:54,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1273666232, now seen corresponding path program 3 times [2023-03-30 22:28:54,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:28:54,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939701371] [2023-03-30 22:28:54,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:28:54,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:28:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:54,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:28:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:54,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:28:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:54,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-03-30 22:28:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:54,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-03-30 22:28:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:54,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-03-30 22:28:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-30 22:28:54,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:28:54,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939701371] [2023-03-30 22:28:54,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939701371] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:28:54,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311744781] [2023-03-30 22:28:54,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:28:54,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:54,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:28:54,363 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) [2023-03-30 22:28:54,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:28:54,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-30 22:28:54,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:28:54,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:28:54,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:28:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-30 22:28:54,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:28:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-30 22:28:54,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311744781] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:28:54,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:28:54,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2023-03-30 22:28:54,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323195872] [2023-03-30 22:28:54,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:28:54,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 22:28:54,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:28:54,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 22:28:54,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:28:54,527 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-30 22:28:54,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:28:54,681 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2023-03-30 22:28:54,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-30 22:28:54,681 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 51 [2023-03-30 22:28:54,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:28:54,683 INFO L225 Difference]: With dead ends: 65 [2023-03-30 22:28:54,683 INFO L226 Difference]: Without dead ends: 56 [2023-03-30 22:28:54,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2023-03-30 22:28:54,684 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 88 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:28:54,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 27 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:28:54,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-03-30 22:28:54,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2023-03-30 22:28:54,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 7 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-30 22:28:54,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2023-03-30 22:28:54,697 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 51 [2023-03-30 22:28:54,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:28:54,698 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2023-03-30 22:28:54,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 5 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-30 22:28:54,698 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2023-03-30 22:28:54,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-03-30 22:28:54,699 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:28:54,699 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-03-30 22:28:54,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:28:54,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:54,907 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:28:54,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:28:54,907 INFO L85 PathProgramCache]: Analyzing trace with hash 2126656452, now seen corresponding path program 4 times [2023-03-30 22:28:54,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:28:54,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551782932] [2023-03-30 22:28:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:28:54,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:28:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:55,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:28:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:55,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:28:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:55,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-03-30 22:28:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:55,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-03-30 22:28:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:55,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-03-30 22:28:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:28:55,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:28:55,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551782932] [2023-03-30 22:28:55,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551782932] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:28:55,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697762031] [2023-03-30 22:28:55,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:28:55,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:55,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:28:55,793 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) [2023-03-30 22:28:55,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-30 22:28:55,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:28:55,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:28:55,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 46 conjunts are in the unsatisfiable core [2023-03-30 22:28:55,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:28:55,884 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 10 treesize of output 8 [2023-03-30 22:28:56,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2023-03-30 22:28:56,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 39 [2023-03-30 22:28:56,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 20 [2023-03-30 22:28:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-30 22:28:56,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:28:57,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697762031] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:28:57,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-30 22:28:57,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 40 [2023-03-30 22:28:57,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251556921] [2023-03-30 22:28:57,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-30 22:28:57,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-03-30 22:28:57,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:28:57,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-03-30 22:28:57,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2224, Unknown=0, NotChecked=0, Total=2450 [2023-03-30 22:28:57,262 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 40 states, 40 states have (on average 1.575) internal successors, (63), 37 states have internal predecessors, (63), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-03-30 22:28:58,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:28:58,742 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2023-03-30 22:28:58,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-03-30 22:28:58,742 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.575) internal successors, (63), 37 states have internal predecessors, (63), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 55 [2023-03-30 22:28:58,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:28:58,743 INFO L225 Difference]: With dead ends: 77 [2023-03-30 22:28:58,743 INFO L226 Difference]: Without dead ends: 72 [2023-03-30 22:28:58,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=626, Invalid=4924, Unknown=0, NotChecked=0, Total=5550 [2023-03-30 22:28:58,745 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 125 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-30 22:28:58,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 89 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-30 22:28:58,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-03-30 22:28:58,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2023-03-30 22:28:58,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 53 states have internal predecessors, (66), 9 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-30 22:28:58,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2023-03-30 22:28:58,770 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 55 [2023-03-30 22:28:58,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:28:58,770 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2023-03-30 22:28:58,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.575) internal successors, (63), 37 states have internal predecessors, (63), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-03-30 22:28:58,770 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2023-03-30 22:28:58,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-03-30 22:28:58,771 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:28:58,771 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1] [2023-03-30 22:28:58,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-30 22:28:58,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:28:58,976 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:28:58,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:28:58,976 INFO L85 PathProgramCache]: Analyzing trace with hash 437712710, now seen corresponding path program 1 times [2023-03-30 22:28:58,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:28:58,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016790818] [2023-03-30 22:28:58,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:28:58,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:28:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:59,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:28:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:59,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:28:59,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:59,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-03-30 22:28:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:28:59,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-03-30 22:28:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:00,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-03-30 22:29:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:29:00,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:29:00,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016790818] [2023-03-30 22:29:00,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016790818] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:29:00,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596381960] [2023-03-30 22:29:00,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:29:00,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:29:00,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:29:00,045 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) [2023-03-30 22:29:00,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-30 22:29:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:00,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 45 conjunts are in the unsatisfiable core [2023-03-30 22:29:00,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:29:00,112 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 10 treesize of output 8 [2023-03-30 22:29:00,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2023-03-30 22:29:00,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 42 [2023-03-30 22:29:00,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2023-03-30 22:29:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-30 22:29:00,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:29:01,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596381960] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:29:01,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-30 22:29:01,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20] total 41 [2023-03-30 22:29:01,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697878741] [2023-03-30 22:29:01,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-30 22:29:01,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-03-30 22:29:01,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:29:01,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-03-30 22:29:01,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2342, Unknown=0, NotChecked=0, Total=2550 [2023-03-30 22:29:01,265 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 38 states have internal predecessors, (63), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-03-30 22:29:04,534 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] [2023-03-30 22:29:05,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:29:05,201 INFO L93 Difference]: Finished difference Result 105 states and 130 transitions. [2023-03-30 22:29:05,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-03-30 22:29:05,202 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 38 states have internal predecessors, (63), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 55 [2023-03-30 22:29:05,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:29:05,202 INFO L225 Difference]: With dead ends: 105 [2023-03-30 22:29:05,203 INFO L226 Difference]: Without dead ends: 99 [2023-03-30 22:29:05,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=706, Invalid=5774, Unknown=0, NotChecked=0, Total=6480 [2023-03-30 22:29:05,205 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 172 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 82 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-03-30 22:29:05,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 83 Invalid, 1485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1402 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2023-03-30 22:29:05,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-03-30 22:29:05,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2023-03-30 22:29:05,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 66 states have internal predecessors, (84), 10 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-30 22:29:05,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2023-03-30 22:29:05,212 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 55 [2023-03-30 22:29:05,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:29:05,213 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2023-03-30 22:29:05,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 38 states have internal predecessors, (63), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-03-30 22:29:05,213 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2023-03-30 22:29:05,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-03-30 22:29:05,213 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:29:05,213 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1] [2023-03-30 22:29:05,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-03-30 22:29:05,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:29:05,418 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:29:05,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:29:05,418 INFO L85 PathProgramCache]: Analyzing trace with hash -782107450, now seen corresponding path program 2 times [2023-03-30 22:29:05,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:29:05,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226103349] [2023-03-30 22:29:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:29:05,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:29:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:06,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:29:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:06,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:29:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:06,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-03-30 22:29:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:06,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-03-30 22:29:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:06,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-03-30 22:29:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:29:06,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:29:06,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226103349] [2023-03-30 22:29:06,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226103349] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:29:06,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884992145] [2023-03-30 22:29:06,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:29:06,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:29:06,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:29:06,301 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) [2023-03-30 22:29:06,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-30 22:29:06,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:29:06,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:29:06,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 48 conjunts are in the unsatisfiable core [2023-03-30 22:29:06,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:29:06,446 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 10 treesize of output 8 [2023-03-30 22:29:06,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2023-03-30 22:29:07,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 39 [2023-03-30 22:29:07,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 20 [2023-03-30 22:29:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-30 22:29:07,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:29:08,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884992145] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:29:08,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-30 22:29:08,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 45 [2023-03-30 22:29:08,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384790943] [2023-03-30 22:29:08,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-30 22:29:08,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-03-30 22:29:08,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:29:08,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-03-30 22:29:08,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2939, Unknown=0, NotChecked=0, Total=3192 [2023-03-30 22:29:08,544 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 45 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 41 states have internal predecessors, (63), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-03-30 22:29:11,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:29:11,564 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2023-03-30 22:29:11,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-03-30 22:29:11,564 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 41 states have internal predecessors, (63), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 55 [2023-03-30 22:29:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:29:11,565 INFO L225 Difference]: With dead ends: 157 [2023-03-30 22:29:11,565 INFO L226 Difference]: Without dead ends: 152 [2023-03-30 22:29:11,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1102, Invalid=8018, Unknown=0, NotChecked=0, Total=9120 [2023-03-30 22:29:11,567 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 156 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:29:11,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 107 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1543 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-30 22:29:11,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-03-30 22:29:11,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 83. [2023-03-30 22:29:11,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 69 states have (on average 1.289855072463768) internal successors, (89), 69 states have internal predecessors, (89), 11 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-30 22:29:11,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 109 transitions. [2023-03-30 22:29:11,576 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 109 transitions. Word has length 55 [2023-03-30 22:29:11,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:29:11,576 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 109 transitions. [2023-03-30 22:29:11,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 41 states have internal predecessors, (63), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-03-30 22:29:11,577 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 109 transitions. [2023-03-30 22:29:11,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-03-30 22:29:11,577 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:29:11,577 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2023-03-30 22:29:11,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-03-30 22:29:11,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:29:11,778 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:29:11,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:29:11,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1823916104, now seen corresponding path program 2 times [2023-03-30 22:29:11,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:29:11,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887653327] [2023-03-30 22:29:11,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:29:11,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:29:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:12,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:29:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:12,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:29:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:12,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-03-30 22:29:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:12,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-03-30 22:29:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:12,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-03-30 22:29:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:29:12,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:29:12,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887653327] [2023-03-30 22:29:12,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887653327] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:29:12,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527355611] [2023-03-30 22:29:12,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:29:12,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:29:12,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:29:12,620 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) [2023-03-30 22:29:12,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-30 22:29:12,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:29:12,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:29:12,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 46 conjunts are in the unsatisfiable core [2023-03-30 22:29:12,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:29:12,697 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 10 treesize of output 8 [2023-03-30 22:29:13,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2023-03-30 22:29:13,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 42 [2023-03-30 22:29:13,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2023-03-30 22:29:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-30 22:29:13,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:29:15,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527355611] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:29:15,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-30 22:29:15,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 41 [2023-03-30 22:29:15,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824778617] [2023-03-30 22:29:15,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-30 22:29:15,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-03-30 22:29:15,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:29:15,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-03-30 22:29:15,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2344, Unknown=1, NotChecked=0, Total=2550 [2023-03-30 22:29:15,945 INFO L87 Difference]: Start difference. First operand 83 states and 109 transitions. Second operand has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 38 states have internal predecessors, (63), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-03-30 22:29:19,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:29:22,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-30 22:29:22,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:29:22,659 INFO L93 Difference]: Finished difference Result 170 states and 216 transitions. [2023-03-30 22:29:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-03-30 22:29:22,660 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 38 states have internal predecessors, (63), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 55 [2023-03-30 22:29:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:29:22,661 INFO L225 Difference]: With dead ends: 170 [2023-03-30 22:29:22,661 INFO L226 Difference]: Without dead ends: 164 [2023-03-30 22:29:22,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2312 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=988, Invalid=7567, Unknown=1, NotChecked=0, Total=8556 [2023-03-30 22:29:22,663 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 154 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 129 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-03-30 22:29:22,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 69 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1429 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2023-03-30 22:29:22,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2023-03-30 22:29:22,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 95. [2023-03-30 22:29:22,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 80 states have (on average 1.3) internal successors, (104), 80 states have internal predecessors, (104), 12 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-30 22:29:22,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 126 transitions. [2023-03-30 22:29:22,673 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 126 transitions. Word has length 55 [2023-03-30 22:29:22,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:29:22,674 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 126 transitions. [2023-03-30 22:29:22,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 38 states have internal predecessors, (63), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-03-30 22:29:22,674 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 126 transitions. [2023-03-30 22:29:22,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-03-30 22:29:22,674 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:29:22,674 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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] [2023-03-30 22:29:22,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-30 22:29:22,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-03-30 22:29:22,879 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:29:22,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:29:22,879 INFO L85 PathProgramCache]: Analyzing trace with hash 242817954, now seen corresponding path program 5 times [2023-03-30 22:29:22,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:29:22,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324944044] [2023-03-30 22:29:22,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:29:22,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:29:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:22,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:29:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:22,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:29:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:22,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-03-30 22:29:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:22,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-03-30 22:29:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:22,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-03-30 22:29:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-30 22:29:22,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:29:22,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324944044] [2023-03-30 22:29:22,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324944044] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:29:22,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988910292] [2023-03-30 22:29:22,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-30 22:29:22,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:29:22,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:29:22,970 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) [2023-03-30 22:29:22,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-30 22:29:23,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-03-30 22:29:23,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:29:23,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 22:29:23,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:29:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-30 22:29:23,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:29:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-30 22:29:23,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988910292] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:29:23,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:29:23,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2023-03-30 22:29:23,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175280023] [2023-03-30 22:29:23,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:29:23,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-30 22:29:23,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:29:23,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-30 22:29:23,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-03-30 22:29:23,167 INFO L87 Difference]: Start difference. First operand 95 states and 126 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 5 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-30 22:29:23,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:29:23,368 INFO L93 Difference]: Finished difference Result 176 states and 228 transitions. [2023-03-30 22:29:23,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 22:29:23,369 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 5 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 57 [2023-03-30 22:29:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:29:23,369 INFO L225 Difference]: With dead ends: 176 [2023-03-30 22:29:23,369 INFO L226 Difference]: Without dead ends: 137 [2023-03-30 22:29:23,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 114 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2023-03-30 22:29:23,370 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 115 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:29:23,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 37 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:29:23,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-03-30 22:29:23,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 111. [2023-03-30 22:29:23,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 96 states have (on average 1.2395833333333333) internal successors, (119), 96 states have internal predecessors, (119), 12 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-30 22:29:23,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 141 transitions. [2023-03-30 22:29:23,387 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 141 transitions. Word has length 57 [2023-03-30 22:29:23,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:29:23,387 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 141 transitions. [2023-03-30 22:29:23,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 14 states have internal predecessors, (50), 5 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-03-30 22:29:23,387 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 141 transitions. [2023-03-30 22:29:23,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-03-30 22:29:23,388 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:29:23,388 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-30 22:29:23,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-30 22:29:23,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:29:23,592 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:29:23,594 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:29:23,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1024371084, now seen corresponding path program 6 times [2023-03-30 22:29:23,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:29:23,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188664817] [2023-03-30 22:29:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:29:23,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:29:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:23,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:29:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:23,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:29:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:23,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-03-30 22:29:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:23,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-03-30 22:29:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:23,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-03-30 22:29:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:23,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-03-30 22:29:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:23,679 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-03-30 22:29:23,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:29:23,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188664817] [2023-03-30 22:29:23,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188664817] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:29:23,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172943470] [2023-03-30 22:29:23,679 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-03-30 22:29:23,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:29:23,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:29:23,694 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) [2023-03-30 22:29:23,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-30 22:29:23,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-03-30 22:29:23,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:29:23,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-30 22:29:23,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:29:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-03-30 22:29:23,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:29:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-03-30 22:29:23,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172943470] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:29:23,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:29:23,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2023-03-30 22:29:23,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082936975] [2023-03-30 22:29:23,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:29:23,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-30 22:29:23,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:29:23,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-30 22:29:23,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-03-30 22:29:23,898 INFO L87 Difference]: Start difference. First operand 111 states and 141 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 6 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-03-30 22:29:24,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:29:24,158 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2023-03-30 22:29:24,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 22:29:24,159 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 6 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2023-03-30 22:29:24,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:29:24,160 INFO L225 Difference]: With dead ends: 124 [2023-03-30 22:29:24,160 INFO L226 Difference]: Without dead ends: 113 [2023-03-30 22:29:24,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 131 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-03-30 22:29:24,160 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 94 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:29:24,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 52 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:29:24,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-03-30 22:29:24,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 54. [2023-03-30 22:29:24,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 8 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-30 22:29:24,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2023-03-30 22:29:24,170 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 65 [2023-03-30 22:29:24,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:29:24,170 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2023-03-30 22:29:24,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 6 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-03-30 22:29:24,171 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2023-03-30 22:29:24,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-03-30 22:29:24,181 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:29:24,181 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 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] [2023-03-30 22:29:24,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-03-30 22:29:24,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-03-30 22:29:24,382 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:29:24,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:29:24,382 INFO L85 PathProgramCache]: Analyzing trace with hash 11706096, now seen corresponding path program 7 times [2023-03-30 22:29:24,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:29:24,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742707542] [2023-03-30 22:29:24,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:29:24,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:29:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:25,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:29:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:25,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:29:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:25,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-03-30 22:29:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:25,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-03-30 22:29:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:25,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-03-30 22:29:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:25,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-03-30 22:29:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-30 22:29:25,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:29:25,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742707542] [2023-03-30 22:29:25,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742707542] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:29:25,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321204263] [2023-03-30 22:29:25,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-30 22:29:25,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:29:25,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:29:25,905 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) [2023-03-30 22:29:25,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-03-30 22:29:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:25,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 57 conjunts are in the unsatisfiable core [2023-03-30 22:29:25,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:29:26,001 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 10 treesize of output 8 [2023-03-30 22:29:26,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2023-03-30 22:29:26,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 59 [2023-03-30 22:29:26,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 63 [2023-03-30 22:29:27,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2023-03-30 22:29:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-03-30 22:29:27,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:29:29,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321204263] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:29:29,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-03-30 22:29:29,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28] total 55 [2023-03-30 22:29:29,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562759878] [2023-03-30 22:29:29,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-03-30 22:29:29,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-03-30 22:29:29,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:29:29,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-03-30 22:29:29,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=4376, Unknown=0, NotChecked=0, Total=4692 [2023-03-30 22:29:29,429 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 55 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 51 states have internal predecessors, (81), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-03-30 22:29:36,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:29:36,055 INFO L93 Difference]: Finished difference Result 169 states and 211 transitions. [2023-03-30 22:29:36,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-03-30 22:29:36,056 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 51 states have internal predecessors, (81), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 69 [2023-03-30 22:29:36,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:29:36,056 INFO L225 Difference]: With dead ends: 169 [2023-03-30 22:29:36,056 INFO L226 Difference]: Without dead ends: 161 [2023-03-30 22:29:36,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5757 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1764, Invalid=18258, Unknown=0, NotChecked=0, Total=20022 [2023-03-30 22:29:36,060 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 269 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:29:36,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 91 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-03-30 22:29:36,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-03-30 22:29:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 119. [2023-03-30 22:29:36,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 100 states have (on average 1.3) internal successors, (130), 100 states have internal predecessors, (130), 15 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-03-30 22:29:36,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 158 transitions. [2023-03-30 22:29:36,083 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 158 transitions. Word has length 69 [2023-03-30 22:29:36,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:29:36,084 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 158 transitions. [2023-03-30 22:29:36,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 51 states have internal predecessors, (81), 10 states have call successors, (14), 5 states have call predecessors, (14), 2 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-03-30 22:29:36,084 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 158 transitions. [2023-03-30 22:29:36,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-03-30 22:29:36,084 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:29:36,085 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:29:36,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-03-30 22:29:36,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-03-30 22:29:36,290 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:29:36,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:29:36,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1793732238, now seen corresponding path program 3 times [2023-03-30 22:29:36,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:29:36,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370794986] [2023-03-30 22:29:36,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:29:36,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:29:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:37,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:29:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:37,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-03-30 22:29:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:37,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-03-30 22:29:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:37,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-03-30 22:29:37,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:37,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-03-30 22:29:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:37,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-03-30 22:29:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:29:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-03-30 22:29:37,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:29:37,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370794986] [2023-03-30 22:29:37,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370794986] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:29:37,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314679209] [2023-03-30 22:29:37,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:29:37,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:29:37,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:29:37,587 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) [2023-03-30 22:29:37,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-03-30 22:29:37,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-03-30 22:29:37,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:29:37,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 60 conjunts are in the unsatisfiable core [2023-03-30 22:29:37,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:29:37,677 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 10 treesize of output 8 [2023-03-30 22:29:38,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:29:38,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:29:38,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 47 [2023-03-30 22:29:38,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:29:38,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:29:38,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2023-03-30 22:29:38,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:29:38,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:29:38,766 INFO L321 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2023-03-30 22:29:38,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 121 treesize of output 97 [2023-03-30 22:29:39,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:29:39,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:29:39,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-30 22:29:39,702 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-30 22:29:39,710 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-30 22:29:39,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 5 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 64 [2023-03-30 22:29:40,037 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 19 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-03-30 22:29:40,037 INFO L327 TraceCheckSpWp]: Computing backward predicates...