/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-crafted/xor4.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 19:14:50,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 19:14:50,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 19:14:50,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 19:14:50,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 19:14:50,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 19:14:50,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 19:14:50,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 19:14:50,411 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 19:14:50,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 19:14:50,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 19:14:50,418 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 19:14:50,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 19:14:50,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 19:14:50,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 19:14:50,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 19:14:50,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 19:14:50,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 19:14:50,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 19:14:50,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 19:14:50,428 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 19:14:50,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 19:14:50,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 19:14:50,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 19:14:50,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 19:14:50,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 19:14:50,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 19:14:50,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 19:14:50,444 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 19:14:50,462 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 19:14:50,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 19:14:50,462 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 19:14:50,462 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 19:14:50,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 19:14:50,463 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 19:14:50,463 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 19:14:50,463 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 19:14:50,463 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 19:14:50,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 19:14:50,464 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 19:14:50,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 19:14:50,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 19:14:50,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 19:14:50,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 19:14:50,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 19:14:50,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 19:14:50,464 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 19:14:50,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 19:14:50,464 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 19:14:50,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 19:14:50,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 19:14:50,465 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 19:14:50,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 19:14:50,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:14:50,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 19:14:50,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 19:14:50,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 19:14:50,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 19:14:50,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 19:14:50,465 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 19:14:50,465 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 19:14:50,466 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 19:14:50,466 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 19:14:50,466 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 19:14:50,466 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 19:14:50,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 19:14:50,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 19:14:50,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 19:14:50,678 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 19:14:50,678 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 19:14:50,679 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/xor4.i [2023-04-01 19:14:51,666 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 19:14:51,807 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 19:14:51,808 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor4.i [2023-04-01 19:14:51,813 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6547690b4/f70e9aa63caa485f858b998cc1c65e3a/FLAG05b922a21 [2023-04-01 19:14:51,827 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6547690b4/f70e9aa63caa485f858b998cc1c65e3a [2023-04-01 19:14:51,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 19:14:51,829 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 19:14:51,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 19:14:51,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 19:14:51,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 19:14:51,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:14:51" (1/1) ... [2023-04-01 19:14:51,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ff02a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:51, skipping insertion in model container [2023-04-01 19:14:51,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:14:51" (1/1) ... [2023-04-01 19:14:51,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 19:14:51,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 19:14:51,975 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-crafted/xor4.i[1303,1316] [2023-04-01 19:14:51,977 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:14:51,988 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 19:14:52,004 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-crafted/xor4.i[1303,1316] [2023-04-01 19:14:52,004 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:14:52,012 INFO L208 MainTranslator]: Completed translation [2023-04-01 19:14:52,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:52 WrapperNode [2023-04-01 19:14:52,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 19:14:52,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 19:14:52,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 19:14:52,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 19:14:52,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:52" (1/1) ... [2023-04-01 19:14:52,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:52" (1/1) ... [2023-04-01 19:14:52,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:52" (1/1) ... [2023-04-01 19:14:52,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:52" (1/1) ... [2023-04-01 19:14:52,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:52" (1/1) ... [2023-04-01 19:14:52,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:52" (1/1) ... [2023-04-01 19:14:52,043 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:52" (1/1) ... [2023-04-01 19:14:52,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:52" (1/1) ... [2023-04-01 19:14:52,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 19:14:52,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 19:14:52,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 19:14:52,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 19:14:52,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:52" (1/1) ... [2023-04-01 19:14:52,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:14:52,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:52,069 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 19:14:52,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 19:14:52,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 19:14:52,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 19:14:52,097 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 19:14:52,097 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2023-04-01 19:14:52,097 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 19:14:52,097 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 19:14:52,098 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 19:14:52,098 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 19:14:52,098 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 19:14:52,098 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 19:14:52,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 19:14:52,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 19:14:52,098 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2023-04-01 19:14:52,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 19:14:52,098 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 19:14:52,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 19:14:52,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 19:14:52,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 19:14:52,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 19:14:52,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 19:14:52,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 19:14:52,167 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 19:14:52,168 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 19:14:52,294 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 19:14:52,298 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 19:14:52,299 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 19:14:52,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:14:52 BoogieIcfgContainer [2023-04-01 19:14:52,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 19:14:52,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 19:14:52,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 19:14:52,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 19:14:52,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 07:14:51" (1/3) ... [2023-04-01 19:14:52,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378a9d31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:14:52, skipping insertion in model container [2023-04-01 19:14:52,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:14:52" (2/3) ... [2023-04-01 19:14:52,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378a9d31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:14:52, skipping insertion in model container [2023-04-01 19:14:52,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:14:52" (3/3) ... [2023-04-01 19:14:52,306 INFO L112 eAbstractionObserver]: Analyzing ICFG xor4.i [2023-04-01 19:14:52,318 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 19:14:52,318 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 19:14:52,349 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 19:14:52,353 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;@69914a02, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 19:14:52,354 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 19:14:52,357 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 19:14:52,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 19:14:52,362 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:52,363 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:52,363 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:52,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:52,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1594462314, now seen corresponding path program 1 times [2023-04-01 19:14:52,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:52,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041685267] [2023-04-01 19:14:52,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:52,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:52,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:52,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:14:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:52,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-04-01 19:14:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:52,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-01 19:14:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 19:14:52,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:52,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041685267] [2023-04-01 19:14:52,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041685267] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:14:52,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:14:52,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 19:14:52,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077187816] [2023-04-01 19:14:52,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:14:52,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:14:52,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:52,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:14:52,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 19:14:52,587 INFO L87 Difference]: Start difference. First operand has 35 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:52,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:52,696 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2023-04-01 19:14:52,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:14:52,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-04-01 19:14:52,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:52,703 INFO L225 Difference]: With dead ends: 62 [2023-04-01 19:14:52,703 INFO L226 Difference]: Without dead ends: 30 [2023-04-01 19:14:52,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 19:14:52,711 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:52,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 10 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:14:52,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-04-01 19:14:52,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-04-01 19:14:52,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:52,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2023-04-01 19:14:52,755 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 32 [2023-04-01 19:14:52,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:52,755 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2023-04-01 19:14:52,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:52,756 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2023-04-01 19:14:52,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 19:14:52,757 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:52,757 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:52,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 19:14:52,757 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:52,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:52,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1766016415, now seen corresponding path program 1 times [2023-04-01 19:14:52,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:52,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205668817] [2023-04-01 19:14:52,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:52,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:52,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:52,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-04-01 19:14:52,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:52,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-04-01 19:14:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:52,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-04-01 19:14:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 19:14:52,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:52,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205668817] [2023-04-01 19:14:52,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205668817] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:52,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339678824] [2023-04-01 19:14:52,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:52,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:52,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:52,917 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:14:52,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 19:14:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:52,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 19:14:52,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:53,001 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 19:14:53,001 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:14:53,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339678824] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:14:53,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 19:14:53,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 19:14:53,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019761208] [2023-04-01 19:14:53,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:14:53,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:14:53,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:53,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:14:53,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:14:53,003 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:53,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:53,013 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-04-01 19:14:53,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:14:53,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-04-01 19:14:53,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:53,014 INFO L225 Difference]: With dead ends: 54 [2023-04-01 19:14:53,014 INFO L226 Difference]: Without dead ends: 32 [2023-04-01 19:14:53,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:14:53,015 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:53,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 68 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:14:53,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-04-01 19:14:53,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2023-04-01 19:14:53,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:53,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-04-01 19:14:53,020 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 32 [2023-04-01 19:14:53,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:53,021 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-04-01 19:14:53,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:53,021 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-04-01 19:14:53,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 19:14:53,021 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:53,022 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:53,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 19:14:53,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:53,227 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:53,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:53,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1146944703, now seen corresponding path program 1 times [2023-04-01 19:14:53,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:53,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300428191] [2023-04-01 19:14:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:53,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:53,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:53,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-01 19:14:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:53,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-04-01 19:14:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:53,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 19:14:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-01 19:14:53,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:53,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300428191] [2023-04-01 19:14:53,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300428191] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:53,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147551070] [2023-04-01 19:14:53,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:53,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:53,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:53,400 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:14:53,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 19:14:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:53,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 19:14:53,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:14:53,489 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:14:53,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147551070] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:14:53,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 19:14:53,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2023-04-01 19:14:53,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811902863] [2023-04-01 19:14:53,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:14:53,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:14:53,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:53,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:14:53,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:14:53,491 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:53,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:53,500 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2023-04-01 19:14:53,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:14:53,501 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2023-04-01 19:14:53,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:53,501 INFO L225 Difference]: With dead ends: 58 [2023-04-01 19:14:53,502 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 19:14:53,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:14:53,503 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:53,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 68 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:14:53,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 19:14:53,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2023-04-01 19:14:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:53,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-04-01 19:14:53,508 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 34 [2023-04-01 19:14:53,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:53,508 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-04-01 19:14:53,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:53,509 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-04-01 19:14:53,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 19:14:53,510 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:53,510 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2023-04-01 19:14:53,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 19:14:53,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 19:14:53,715 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:53,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:53,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1675002724, now seen corresponding path program 1 times [2023-04-01 19:14:53,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:53,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643108629] [2023-04-01 19:14:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:53,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:53,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:53,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-01 19:14:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:53,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 19:14:53,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:53,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 19:14:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 19:14:53,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:53,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643108629] [2023-04-01 19:14:53,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643108629] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:53,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001516680] [2023-04-01 19:14:53,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:53,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:53,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:53,871 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:14:53,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 19:14:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:53,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 19:14:53,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 19:14:54,004 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 19:14:54,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001516680] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:14:54,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 19:14:54,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-04-01 19:14:54,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278427071] [2023-04-01 19:14:54,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:14:54,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 19:14:54,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:54,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 19:14:54,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:14:54,005 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:54,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:54,020 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2023-04-01 19:14:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 19:14:54,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2023-04-01 19:14:54,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:54,023 INFO L225 Difference]: With dead ends: 51 [2023-04-01 19:14:54,023 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 19:14:54,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:14:54,026 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:54,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 68 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:14:54,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 19:14:54,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-04-01 19:14:54,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:54,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2023-04-01 19:14:54,059 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 46 [2023-04-01 19:14:54,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:54,060 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2023-04-01 19:14:54,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:14:54,060 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2023-04-01 19:14:54,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-04-01 19:14:54,061 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:54,061 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2023-04-01 19:14:54,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 19:14:54,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:54,272 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:54,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:54,273 INFO L85 PathProgramCache]: Analyzing trace with hash -711488038, now seen corresponding path program 1 times [2023-04-01 19:14:54,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:54,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661250576] [2023-04-01 19:14:54,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:54,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:54,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:54,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-01 19:14:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:54,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-04-01 19:14:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:54,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-04-01 19:14:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 19:14:54,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:54,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661250576] [2023-04-01 19:14:54,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661250576] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:54,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182836549] [2023-04-01 19:14:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:54,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:54,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:54,363 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) [2023-04-01 19:14:54,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 19:14:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:54,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 19:14:54,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 19:14:54,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 19:14:54,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182836549] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:54,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:54,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 19:14:54,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839778352] [2023-04-01 19:14:54,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:54,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 19:14:54,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:54,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 19:14:54,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 19:14:54,484 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:54,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:54,582 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2023-04-01 19:14:54,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 19:14:54,582 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2023-04-01 19:14:54,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:54,583 INFO L225 Difference]: With dead ends: 63 [2023-04-01 19:14:54,583 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 19:14:54,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:14:54,584 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 38 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:54,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 12 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:14:54,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 19:14:54,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-04-01 19:14:54,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:54,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2023-04-01 19:14:54,596 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 48 [2023-04-01 19:14:54,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:54,596 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2023-04-01 19:14:54,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:54,596 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2023-04-01 19:14:54,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 19:14:54,597 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:54,597 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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, 1] [2023-04-01 19:14:54,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 19:14:54,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:54,798 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:54,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:54,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1508030784, now seen corresponding path program 2 times [2023-04-01 19:14:54,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:54,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132762704] [2023-04-01 19:14:54,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:54,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:54,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:54,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 19:14:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:54,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-04-01 19:14:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:54,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-04-01 19:14:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-04-01 19:14:54,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:54,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132762704] [2023-04-01 19:14:54,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132762704] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:54,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339983834] [2023-04-01 19:14:54,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:14:54,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:54,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:54,858 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:14:54,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 19:14:54,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:14:54,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:14:54,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 19:14:54,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 19:14:54,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-04-01 19:14:55,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339983834] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:55,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:55,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2023-04-01 19:14:55,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544751317] [2023-04-01 19:14:55,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:55,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-04-01 19:14:55,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:55,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-04-01 19:14:55,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2023-04-01 19:14:55,060 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 19:14:55,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:55,298 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2023-04-01 19:14:55,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 19:14:55,298 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2023-04-01 19:14:55,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:55,299 INFO L225 Difference]: With dead ends: 86 [2023-04-01 19:14:55,299 INFO L226 Difference]: Without dead ends: 62 [2023-04-01 19:14:55,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2023-04-01 19:14:55,300 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 86 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:55,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 37 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:14:55,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-04-01 19:14:55,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2023-04-01 19:14:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2023-04-01 19:14:55,306 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 54 [2023-04-01 19:14:55,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:55,306 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2023-04-01 19:14:55,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 2 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-04-01 19:14:55,307 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2023-04-01 19:14:55,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-04-01 19:14:55,308 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:55,308 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:55,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 19:14:55,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:55,525 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:55,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:55,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1278523033, now seen corresponding path program 3 times [2023-04-01 19:14:55,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:55,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829007752] [2023-04-01 19:14:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:55,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:55,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:55,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:14:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:55,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-04-01 19:14:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:55,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2023-04-01 19:14:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2023-04-01 19:14:55,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:55,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829007752] [2023-04-01 19:14:55,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829007752] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:55,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287571375] [2023-04-01 19:14:55,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:14:55,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:55,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:55,621 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:14:55,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 19:14:55,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 19:14:55,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:14:55,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 19:14:55,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-04-01 19:14:55,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-04-01 19:14:55,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287571375] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:55,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:55,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-04-01 19:14:55,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201261223] [2023-04-01 19:14:55,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:55,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 19:14:55,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:55,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 19:14:55,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-04-01 19:14:55,779 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 19:14:55,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:55,943 INFO L93 Difference]: Finished difference Result 113 states and 151 transitions. [2023-04-01 19:14:55,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 19:14:55,943 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 78 [2023-04-01 19:14:55,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:55,944 INFO L225 Difference]: With dead ends: 113 [2023-04-01 19:14:55,944 INFO L226 Difference]: Without dead ends: 84 [2023-04-01 19:14:55,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-04-01 19:14:55,945 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 126 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:55,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 37 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:14:55,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-04-01 19:14:55,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2023-04-01 19:14:55,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.28) internal successors, (96), 75 states have internal predecessors, (96), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:55,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2023-04-01 19:14:55,952 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 78 [2023-04-01 19:14:55,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:55,952 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2023-04-01 19:14:55,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-04-01 19:14:55,952 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2023-04-01 19:14:55,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-01 19:14:55,953 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:55,953 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:55,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 19:14:56,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:56,171 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:56,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:56,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1076481519, now seen corresponding path program 4 times [2023-04-01 19:14:56,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:56,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491878124] [2023-04-01 19:14:56,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:56,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:56,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:56,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-04-01 19:14:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:56,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2023-04-01 19:14:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:56,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-04-01 19:14:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-04-01 19:14:56,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:56,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491878124] [2023-04-01 19:14:56,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491878124] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:56,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135817976] [2023-04-01 19:14:56,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:14:56,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:56,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:56,395 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:14:56,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 19:14:56,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:14:56,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:14:56,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 19:14:56,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:14:56,529 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-04-01 19:14:56,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:14:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-04-01 19:14:56,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135817976] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:14:56,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:14:56,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-04-01 19:14:56,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442946624] [2023-04-01 19:14:56,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:14:56,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 19:14:56,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:14:56,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 19:14:56,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-04-01 19:14:56,735 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:57,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:14:57,126 INFO L93 Difference]: Finished difference Result 163 states and 218 transitions. [2023-04-01 19:14:57,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 19:14:57,126 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2023-04-01 19:14:57,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:14:57,129 INFO L225 Difference]: With dead ends: 163 [2023-04-01 19:14:57,129 INFO L226 Difference]: Without dead ends: 107 [2023-04-01 19:14:57,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 19:14:57,134 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 74 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:14:57,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 22 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:14:57,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-04-01 19:14:57,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-04-01 19:14:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 99 states have internal predecessors, (120), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:14:57,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions. [2023-04-01 19:14:57,156 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 128 [2023-04-01 19:14:57,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:14:57,156 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 129 transitions. [2023-04-01 19:14:57,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:14:57,157 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions. [2023-04-01 19:14:57,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-04-01 19:14:57,158 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:14:57,158 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 18, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:14:57,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 19:14:57,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:57,367 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:14:57,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:14:57,367 INFO L85 PathProgramCache]: Analyzing trace with hash -614230871, now seen corresponding path program 5 times [2023-04-01 19:14:57,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:14:57,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927417750] [2023-04-01 19:14:57,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:14:57,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:14:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:57,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:14:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:57,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-04-01 19:14:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:57,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-04-01 19:14:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:57,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2023-04-01 19:14:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:14:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2023-04-01 19:14:57,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:14:57,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927417750] [2023-04-01 19:14:57,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927417750] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:14:57,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530280015] [2023-04-01 19:14:57,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:14:57,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:14:57,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:14:57,921 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:14:57,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 19:14:59,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-04-01 19:14:59,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:14:59,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 19:14:59,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2023-04-01 19:15:00,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2023-04-01 19:15:00,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530280015] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:00,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:00,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9, 9] total 40 [2023-04-01 19:15:00,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385337401] [2023-04-01 19:15:00,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:00,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-04-01 19:15:00,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:00,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-04-01 19:15:00,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1139, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 19:15:00,197 INFO L87 Difference]: Start difference. First operand 107 states and 129 transitions. Second operand has 40 states, 40 states have (on average 3.25) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:15:01,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:01,027 INFO L93 Difference]: Finished difference Result 214 states and 293 transitions. [2023-04-01 19:15:01,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-04-01 19:15:01,027 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.25) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 152 [2023-04-01 19:15:01,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:01,028 INFO L225 Difference]: With dead ends: 214 [2023-04-01 19:15:01,028 INFO L226 Difference]: Without dead ends: 158 [2023-04-01 19:15:01,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1257, Invalid=4595, Unknown=0, NotChecked=0, Total=5852 [2023-04-01 19:15:01,031 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 335 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:01,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 52 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:15:01,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-04-01 19:15:01,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2023-04-01 19:15:01,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 149 states have (on average 1.3020134228187918) internal successors, (194), 149 states have internal predecessors, (194), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:15:01,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 203 transitions. [2023-04-01 19:15:01,043 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 203 transitions. Word has length 152 [2023-04-01 19:15:01,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:01,043 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 203 transitions. [2023-04-01 19:15:01,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.25) internal successors, (130), 39 states have internal predecessors, (130), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:15:01,043 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 203 transitions. [2023-04-01 19:15:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-04-01 19:15:01,045 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:01,045 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 23, 23, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:01,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 19:15:01,261 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,SelfDestructingSolverStorable8 [2023-04-01 19:15:01,261 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:01,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:01,262 INFO L85 PathProgramCache]: Analyzing trace with hash -929769181, now seen corresponding path program 6 times [2023-04-01 19:15:01,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:01,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168021380] [2023-04-01 19:15:01,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:01,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:01,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:01,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-04-01 19:15:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:01,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2023-04-01 19:15:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:01,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2023-04-01 19:15:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3589 trivial. 0 not checked. [2023-04-01 19:15:01,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:01,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168021380] [2023-04-01 19:15:01,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168021380] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:01,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509493977] [2023-04-01 19:15:01,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 19:15:01,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:01,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:01,922 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:15:01,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 19:15:02,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-04-01 19:15:02,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:15:02,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 19:15:02,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1634 proven. 4 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2023-04-01 19:15:02,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4114 trivial. 0 not checked. [2023-04-01 19:15:02,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509493977] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:02,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:02,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 5, 5] total 33 [2023-04-01 19:15:02,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073539950] [2023-04-01 19:15:02,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:02,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-04-01 19:15:02,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:02,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-04-01 19:15:02,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 19:15:02,183 INFO L87 Difference]: Start difference. First operand 157 states and 203 transitions. Second operand has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:15:02,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:02,665 INFO L93 Difference]: Finished difference Result 272 states and 368 transitions. [2023-04-01 19:15:02,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-04-01 19:15:02,665 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 250 [2023-04-01 19:15:02,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:02,667 INFO L225 Difference]: With dead ends: 272 [2023-04-01 19:15:02,667 INFO L226 Difference]: Without dead ends: 168 [2023-04-01 19:15:02,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1056, Invalid=2850, Unknown=0, NotChecked=0, Total=3906 [2023-04-01 19:15:02,669 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 91 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:02,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 37 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:15:02,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-04-01 19:15:02,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2023-04-01 19:15:02,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 159 states have (on average 1.2830188679245282) internal successors, (204), 159 states have internal predecessors, (204), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:15:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 213 transitions. [2023-04-01 19:15:02,683 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 213 transitions. Word has length 250 [2023-04-01 19:15:02,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:02,683 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 213 transitions. [2023-04-01 19:15:02,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:15:02,683 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 213 transitions. [2023-04-01 19:15:02,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-04-01 19:15:02,686 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:02,686 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 24, 24, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:02,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-04-01 19:15:02,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 19:15:02,891 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:02,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:02,892 INFO L85 PathProgramCache]: Analyzing trace with hash 440820285, now seen corresponding path program 7 times [2023-04-01 19:15:02,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:02,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444295232] [2023-04-01 19:15:02,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:02,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:03,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:03,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-04-01 19:15:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:03,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2023-04-01 19:15:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:03,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2023-04-01 19:15:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:15:03,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:03,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444295232] [2023-04-01 19:15:03,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444295232] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:03,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217375550] [2023-04-01 19:15:03,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 19:15:03,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:03,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:03,514 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:15:03,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 19:15:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:03,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 26 conjunts are in the unsatisfiable core [2023-04-01 19:15:03,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:15:03,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:04,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4197 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:15:04,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217375550] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:04,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:04,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 54 [2023-04-01 19:15:04,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931985699] [2023-04-01 19:15:04,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:04,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-04-01 19:15:04,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:04,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-04-01 19:15:04,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2023-04-01 19:15:04,506 INFO L87 Difference]: Start difference. First operand 167 states and 213 transitions. Second operand has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 53 states have internal predecessors, (131), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:15:05,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:05,517 INFO L93 Difference]: Finished difference Result 331 states and 448 transitions. [2023-04-01 19:15:05,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-04-01 19:15:05,517 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 53 states have internal predecessors, (131), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 260 [2023-04-01 19:15:05,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:05,518 INFO L225 Difference]: With dead ends: 331 [2023-04-01 19:15:05,518 INFO L226 Difference]: Without dead ends: 219 [2023-04-01 19:15:05,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2023-04-01 19:15:05,521 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 130 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:05,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 27 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:15:05,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-04-01 19:15:05,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2023-04-01 19:15:05,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 211 states have (on average 1.2132701421800949) internal successors, (256), 211 states have internal predecessors, (256), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:15:05,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 265 transitions. [2023-04-01 19:15:05,528 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 265 transitions. Word has length 260 [2023-04-01 19:15:05,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:05,528 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 265 transitions. [2023-04-01 19:15:05,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 53 states have internal predecessors, (131), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:15:05,529 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 265 transitions. [2023-04-01 19:15:05,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2023-04-01 19:15:05,530 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:05,531 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:05,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 19:15:05,731 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,SelfDestructingSolverStorable10 [2023-04-01 19:15:05,731 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:05,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:05,732 INFO L85 PathProgramCache]: Analyzing trace with hash -199960527, now seen corresponding path program 8 times [2023-04-01 19:15:05,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:05,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872540922] [2023-04-01 19:15:05,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:05,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:05,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:07,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:07,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:07,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-04-01 19:15:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:07,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2023-04-01 19:15:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:07,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2023-04-01 19:15:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:15:07,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:07,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872540922] [2023-04-01 19:15:07,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872540922] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:07,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109602517] [2023-04-01 19:15:07,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:15:07,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:07,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:07,374 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:15:07,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 19:15:07,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:15:07,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:15:07,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 52 conjunts are in the unsatisfiable core [2023-04-01 19:15:07,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:15:07,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6121 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:15:10,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109602517] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:10,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:10,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2023-04-01 19:15:10,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569732771] [2023-04-01 19:15:10,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:10,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2023-04-01 19:15:10,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:10,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2023-04-01 19:15:10,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2023-04-01 19:15:10,122 INFO L87 Difference]: Start difference. First operand 219 states and 265 transitions. Second operand has 106 states, 106 states have (on average 2.2169811320754715) internal successors, (235), 105 states have internal predecessors, (235), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:15:13,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:13,010 INFO L93 Difference]: Finished difference Result 435 states and 578 transitions. [2023-04-01 19:15:13,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-04-01 19:15:13,011 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.2169811320754715) internal successors, (235), 105 states have internal predecessors, (235), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 312 [2023-04-01 19:15:13,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:13,012 INFO L225 Difference]: With dead ends: 435 [2023-04-01 19:15:13,012 INFO L226 Difference]: Without dead ends: 323 [2023-04-01 19:15:13,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6726 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=16173, Invalid=26883, Unknown=0, NotChecked=0, Total=43056 [2023-04-01 19:15:13,020 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 234 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:13,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 42 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:15:13,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-04-01 19:15:13,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2023-04-01 19:15:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 315 states have (on average 1.1428571428571428) internal successors, (360), 315 states have internal predecessors, (360), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:15:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 369 transitions. [2023-04-01 19:15:13,049 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 369 transitions. Word has length 312 [2023-04-01 19:15:13,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:13,049 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 369 transitions. [2023-04-01 19:15:13,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.2169811320754715) internal successors, (235), 105 states have internal predecessors, (235), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:15:13,049 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 369 transitions. [2023-04-01 19:15:13,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 417 [2023-04-01 19:15:13,055 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:13,056 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 42, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:13,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-04-01 19:15:13,262 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,SelfDestructingSolverStorable11 [2023-04-01 19:15:13,262 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:13,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:13,263 INFO L85 PathProgramCache]: Analyzing trace with hash -259469799, now seen corresponding path program 9 times [2023-04-01 19:15:13,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:13,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472011851] [2023-04-01 19:15:13,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:13,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:13,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:18,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:18,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2023-04-01 19:15:18,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:18,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2023-04-01 19:15:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:18,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 351 [2023-04-01 19:15:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 3621 trivial. 0 not checked. [2023-04-01 19:15:18,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:18,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472011851] [2023-04-01 19:15:18,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472011851] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:18,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412061570] [2023-04-01 19:15:18,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:15:18,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:18,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:18,881 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:15:18,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 19:15:19,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-04-01 19:15:19,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:15:19,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-01 19:15:19,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 1837 proven. 36 refuted. 0 times theorem prover too weak. 12152 trivial. 0 not checked. [2023-04-01 19:15:19,670 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13989 trivial. 0 not checked. [2023-04-01 19:15:20,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412061570] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:20,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:20,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 11, 9] total 122 [2023-04-01 19:15:20,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844020443] [2023-04-01 19:15:20,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:20,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2023-04-01 19:15:20,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:20,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2023-04-01 19:15:20,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5792, Invalid=8970, Unknown=0, NotChecked=0, Total=14762 [2023-04-01 19:15:20,023 INFO L87 Difference]: Start difference. First operand 323 states and 369 transitions. Second operand has 122 states, 122 states have (on average 2.2131147540983607) internal successors, (270), 121 states have internal predecessors, (270), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:15:24,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:24,324 INFO L93 Difference]: Finished difference Result 455 states and 556 transitions. [2023-04-01 19:15:24,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-04-01 19:15:24,325 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.2131147540983607) internal successors, (270), 121 states have internal predecessors, (270), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 416 [2023-04-01 19:15:24,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:24,326 INFO L225 Difference]: With dead ends: 455 [2023-04-01 19:15:24,326 INFO L226 Difference]: Without dead ends: 343 [2023-04-01 19:15:24,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1064 GetRequests, 825 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9210 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=17398, Invalid=40442, Unknown=0, NotChecked=0, Total=57840 [2023-04-01 19:15:24,331 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 300 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:24,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 77 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:15:24,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2023-04-01 19:15:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2023-04-01 19:15:24,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 335 states have (on average 1.1343283582089552) internal successors, (380), 335 states have internal predecessors, (380), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:15:24,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 389 transitions. [2023-04-01 19:15:24,341 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 389 transitions. Word has length 416 [2023-04-01 19:15:24,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:24,341 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 389 transitions. [2023-04-01 19:15:24,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.2131147540983607) internal successors, (270), 121 states have internal predecessors, (270), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:15:24,341 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 389 transitions. [2023-04-01 19:15:24,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-04-01 19:15:24,343 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:24,343 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 42, 42, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:24,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-04-01 19:15:24,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 19:15:24,554 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:24,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:24,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1615838003, now seen corresponding path program 10 times [2023-04-01 19:15:24,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:24,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576207213] [2023-04-01 19:15:24,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:24,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:30,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:15:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:30,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2023-04-01 19:15:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:30,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2023-04-01 19:15:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:30,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 371 [2023-04-01 19:15:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:15:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14597 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2023-04-01 19:15:30,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:15:30,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576207213] [2023-04-01 19:15:30,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576207213] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:15:30,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878807372] [2023-04-01 19:15:30,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:15:30,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:15:30,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:15:30,081 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:15:30,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 19:15:30,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:15:30,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:15:30,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 106 conjunts are in the unsatisfiable core [2023-04-01 19:15:30,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:15:30,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14597 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2023-04-01 19:15:30,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:15:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14597 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2023-04-01 19:15:40,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878807372] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:15:40,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:15:40,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 107, 107] total 214 [2023-04-01 19:15:40,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398621326] [2023-04-01 19:15:40,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:15:40,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 214 states [2023-04-01 19:15:40,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:15:40,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 214 interpolants. [2023-04-01 19:15:40,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22580, Invalid=23002, Unknown=0, NotChecked=0, Total=45582 [2023-04-01 19:15:40,835 INFO L87 Difference]: Start difference. First operand 343 states and 389 transitions. Second operand has 214 states, 214 states have (on average 2.107476635514019) internal successors, (451), 213 states have internal predecessors, (451), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:15:51,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:15:51,706 INFO L93 Difference]: Finished difference Result 683 states and 880 transitions. [2023-04-01 19:15:51,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2023-04-01 19:15:51,707 INFO L78 Accepts]: Start accepts. Automaton has has 214 states, 214 states have (on average 2.107476635514019) internal successors, (451), 213 states have internal predecessors, (451), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 436 [2023-04-01 19:15:51,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:15:51,708 INFO L225 Difference]: With dead ends: 683 [2023-04-01 19:15:51,708 INFO L226 Difference]: Without dead ends: 555 [2023-04-01 19:15:51,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1196 GetRequests, 774 SyntacticMatches, 0 SemanticMatches, 422 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28029 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=67311, Invalid=112041, Unknown=0, NotChecked=0, Total=179352 [2023-04-01 19:15:51,716 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 450 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 19:15:51,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 27 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 19:15:51,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2023-04-01 19:15:51,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 555. [2023-04-01 19:15:51,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 547 states have (on average 1.0822669104204754) internal successors, (592), 547 states have internal predecessors, (592), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:15:51,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 601 transitions. [2023-04-01 19:15:51,730 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 601 transitions. Word has length 436 [2023-04-01 19:15:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:15:51,731 INFO L495 AbstractCegarLoop]: Abstraction has 555 states and 601 transitions. [2023-04-01 19:15:51,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 214 states, 214 states have (on average 2.107476635514019) internal successors, (451), 213 states have internal predecessors, (451), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-04-01 19:15:51,731 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 601 transitions. [2023-04-01 19:15:51,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2023-04-01 19:15:51,734 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:15:51,734 INFO L195 NwaCegarLoop]: trace histogram [210, 210, 42, 42, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:15:51,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-04-01 19:15:51,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 19:15:51,946 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:15:51,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:15:51,946 INFO L85 PathProgramCache]: Analyzing trace with hash -761874079, now seen corresponding path program 11 times [2023-04-01 19:15:51,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:15:51,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429838187] [2023-04-01 19:15:51,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:15:51,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:15:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:16:08,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:16:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:16:08,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 427 [2023-04-01 19:16:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:16:08,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2023-04-01 19:16:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:16:08,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 583 [2023-04-01 19:16:08,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:16:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 47881 backedges. 0 proven. 44100 refuted. 0 times theorem prover too weak. 3781 trivial. 0 not checked. [2023-04-01 19:16:08,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:16:08,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429838187] [2023-04-01 19:16:08,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429838187] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:16:08,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829561719] [2023-04-01 19:16:08,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:16:08,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:16:08,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:16:08,893 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:16:08,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process